Professor kariman method for underground extraction of minerals by large blocks

FIELD: mining.

SUBSTANCE: mining method by large blocks includes advanced formation of bed underbreaking by plough machine with movement of conveyor into it for output of rectangular blocks of mineral cut from long face above it by cutting longitudinal and lateral slots with the use of supports. The output of alluvial mineral from plough operation is done by separate chain-and-flight conveyor. Plough operation in ripping lip is done simultaneously with cutting mineral blocks from the bed upper part by cutting longitudinal and lateral slots by cutting machines and loading of mineral blocks extracted from long face by transfer platform as well as their locomotive haulage from long face to the point of their discharge into grinding chamber.

EFFECT: invention provides multiple increase of mining face productivity in comparison to the existing level, creation of safe by gas factor and ecologically pure by dust production.

6 cl, 15 dwg

 

The invention relates to mining in the area of underground mining of minerals lying flat seams.

Existing methods of underground mining of fossil-based grinding his parting from the array using combine harvesters, planes, drilling machines, water jets, jackhammers, drilling and blasting method or hand tools [1]. In this regard, these methods are very energy-consuming, labor-intensive, environmentally unfriendly lead to the great injury of miners.

Executive bodies excavation machines and working tools wear out quickly, require monthly replacement, often during working hours. In the presence of the layer of solids or substitutions of fossil hard rock requires the use of blasting, which leads to equipment damage, injury, prolonged unproductive costs and downtime. When the office of fossil from an array by its destruction in the atmosphere of the face stands out a lot of gas and dust. This leads to heavy dust explosions. High dust concentration in the atmosphere of faces leads to occupational diseases of miners - introcaso.

The fossil large blocks can virtually eliminate the effect of these negative factors with a significant increase in productivity and efficiency.

The destruction of EXT is by fossil irrational and for many reasons it further transportation, since we know that the cost of transportation, loading, unloading and warehousing of placer goods is always significantly higher than concentrated in large blocks. When transporting fossil large blocks, it does not burn or gets frozen, and therefore is not also damage cars during unloading and cleaning.

When transporting mined fossil large distances large blocks in wagons by rail and on ships at sea transportation per unit volume occupied by the cargo space can hold 30-40% more fossil by weight, since the share of fossil in the array is always greater than the value than in the filling. In this regard, there is considerable savings in transport and warehousing, sorting and handling.

Closest to the application is a patent for a "Method of Kaimana underground development of mineral deposits" (see RF patent №2383736 C2 E21C 41/00 2006.1).

The fossil is made by cutting out from the bottom hole of the array of large blocks with one gidratnoi machine, equipped Executive tools for cutting three types of slots:

- cross over the entire layer thickness, directed perpendicular to the line stope; transverse slits are cut along the length of the lava in the bottom hole array at the same distance from each other and equal to the length of cut blocks fossil;

- rear vertical slit along the length of the lava and the height at full capacity of the reservoir, separating excavated on this cycle bottomhole array from the rest of the array;

the upper slit, parallel to the plane of the layer, cut along the roof of the reservoir through the array of fossil along the length of the lava.

Transverse slits are cut when stopped gidratnoi car, and the rear vertical slit and the upper border of the roof are cut when moving. Cutting transverse slots precedes each section along the length of the lava to cutting back and upper slits.

The cutting of the slits is preceded by pre-creating the lower Podravka layer simultaneously along the entire length of the lava. The lower bomb it is the work of a plane while moving in the formed cavity of the delivery conveyor. Cut blocks fossil is made after complete valve hemmed in the cavity of the delivery conveyor when stopped the plow.

Loading blocks on the conveyor is made by dropping down under its own weight on the load-carrying plate conveyor, which moves the blocks to transportation development.

In the method adopted for the prototype, there are a number of irrational technological solutions in the revision which reveals the possibility of a sharp increase in produce is a major stope. These include:

1. The impossibility of combining cutting blocks fossil with a plow on the education of the lower Podravka; this leads to an increase in the cycle time for 30-40 minutes.

2. The impossibility of combining cutting transverse slots with simultaneous displacement of the rear vertical slit and the top of the slit along the roof of the reservoir; this leads to an increase in the cycle time for another 30-40 minutes.

3. Speed-cutting the rear vertical slit and the top of the slit may be no more than 1-2 m/min abrasive hidromasaje; when used for these purposes, coal-cutter with cutting bars with mechanized movement of cables speed cutting slits can be increased to 6 m/min

4. Cutting transverse slots before cutting longitudinal (back and top) of the slots prevents the development of scope of work for cutting longitudinal slits, and prevents the combination of cutting transverse slots and execution of the idle driving electric cars, which increases the cycle time for another 17-20 minutes.

5. Difficulty mechanization move emulsion sleeves in mobile gidratnoi machine.

The purpose of the invention is similar to the purpose of the prototype is to create a technology that provides a significant performance increase stope on when avanyu with the existing average performance Shearer and plow full-mechanized longwall mining, ensuring a high level of security of wastewater treatment works, including gas-oil ratio, the elimination of dust in the air lava dust generated during the extraction of fossil, the elimination of non-motorized heavy labour, ensuring a high technical and economic indicators of production when working Stopes in difficult mining and geological conditions. The goal should be achieved without the creation of new types of pollution control equipment, but only when used in a new way of existing equipment or the conversion of its small number of new parts. In the basis of new production technologies should stay the same concept as in technology - prototype: cutting fossil large blocks and transporting them outside fresh air.

According to the submitted application, a new method of mining minerals is the parallel execution of the following technological processes:

- creation of the lower Podravka reservoir through the work of the plow Assembly as part of a plow, scraper conveyor, hydraulic roof supports "Sputnik" they are used;

- cut electric machines bottom of the array along the length of the lava with his down on the underneath of the plate conveyor by cutting cutting bars and rear vertical top border PLA is t - roof cracks;

- waterjet cutting water jet high pressure transverse cracks on the cut thicker bottom-hole array at the bottom of the lava when left work plate conveyor;

- work plate conveyor for moving lying on its load-carrying plates cut out the bottom hole array in the lower part of the lava and cutting transverse cracks using gidratnoi machine;

- work plate conveyor and loading platform overload cut blocks with fossil plate conveyor on the vehicle, in transport development;

shifting mechanized roof supports and the plate conveyor in a new position after discharge of all blocks with the delivery conveyor and the end of the idle driving electric cars, and podvigina lava on the width of electric machines;

movement of loaded structures with blocks of fossil fuels and compositions of fossil placer in trolleys to the point of discharge from the crushing chamber and empty trains back;

- unloading of placer mineral mining hopper;

- unloading blocks of fossil into the crushing chamber, grinding extracted blocks fossil in heaps, and outside fresh air supplied for ventilation lava.

This method of development is otki, while maintaining all the advantages of the prototype: the security of gas factor environmentally friendly dust and others, has a very important advantage is the very high performance stope due to the fact that the duration of the technological cycle of production is reduced to 60 minutes. When moving on a conveyor width of the rod 2.4 m speed podvigina stope can grow up to 43 m/day. At such speeds, podvigina lava management roof can be smooth deflection.

The invention is illustrated by drawings, each of which is shown following.

Figure 1. The arrangement of pollution control equipment in a mining face, view the profile; 1 - lower bomb it; 2 - bottom of the lower Podravka; 3 production; 4 - scraper conveyor; 5 - support "Sputnik"; 6 - they are used; 7 - plate conveyor; 8 - cut unit of fossil; 9 - electric machine; 10 - cholernie guides; 11 - cutter bar cutting back slit; 12 - shaft feeder rotation from the cutting end to the bar; 13 - rear vertical slit; 14 - electric machine cutting through the upper slit; 15 - cutting bar cutting the top of the slit; 16 - upper gap; 17 - cholernie guides electric machine; 18 - cable electric machine; 19 - visor mechanized roof supports.

Figure 2. Cutting transverse slots gidratnoi cleaning machine "the THUNDER"; profile;

1 - lower bomb it; 7 - plate conveyor; 19 - visor of meganisi vannoy lining; 20 - slotted portion of the lateral slit; 21 - cut from the bottom of the array thickness fossil, cross cut slits into separate blocks; 22 - waterjet stream; 23 - waterjet cutting head; 24 - metal water supply pipe high pressure (SVD) to the cutting head; 25 - flexible supply tube abrasive to the cutting head; 26 - guides moving Executive gidroliznogo tool horizontally; 27 - guides moving Executive gidroliznogo tool vertically; 28 - feed hopper for abrasive; 29 - adapter; 30 - vertical metal tube water supply SVD to the cutting head; 31 - horizontal space hosting highway water supply SVD to gitorious nodes; 32 - highway water supply SVD.

Figure 3. Cutting transverse cracks Executive tool gidratnoi machine "the THUNDER", type in the plan;

20 - slotted portion of the lateral slit; 23 - waterjet cutting head; 24 - metal supply tube ultra high pressure water to the cutting head; 25 - flexible supply tube abrasive to the cutting head; 26 - guides move horizontally truck with the Executive instrument; 28 - feed hopper for abrasive; 29 - adapter; 31 - horizontal space hosting highway water supply SVD to the cutting units; 32 - magis is Rahl water supply SVD.

Figure 4. Power steering; front view; 33 - hydromultipoles; receiver 34; 35 - filter; 36 is a pump for water injection.

Figure 5. Plate conveyor; cross section;

37 - carrying plate; 38 - rollers; 39 - pans; 40 - supporting channel bar; 41 - supporting transverse plate; 42 - roller; 43 - eyes; 44 - blades; 45 - traction chain; 46 - axis; 47 - axis idlers; 48 - transverse plate holders axes idlers.

Figure 6. The location of the actuator plate conveyor; in profile and plan; 37 - carrying plate; 49 - linear section; 50 - transitional section; 51 - pass vydatnou drum; 52 - actuator with gear.

Figure 7. Overload block with fossil plate conveyor to transport the platform using the transfer platform; 37 - carrying plate; 41 to the base plate; 42 - roller; 45 - traction chain; 51 by - pass drum; 53 - the drive sprocket; 54 - overload unit of fossil; 55 transport platform; 56 - they are used; 57 - stoppers; 58 - body; 59 - metal guides; 60 to the underside of the vehicle with motorized vidigal.

Figure 8. Loading point stope, type in the plan; 55 transport platform; 61 to drive the head plate conveyor; 62 - handling platform; 63 - rail track 900 mm; 64 - the drive station of Strugo the second unit; 65 - loader.

Figure 9. Freight transport platform for transporting the units of fossil; a) front view; b) view in the plan; C) view profile; 66 - platform type title; 67 - working space under the cargo design haul truck 2 TDS.

Figure 10. Section of transportation tunnel, adjacent to the lava, when transporting fossil large blocks on the platforms and placer fossil from the lower Podravka trolleys; view profile; 68 - loop trolley for transportation placer fossil from the lower Podravka; 69 - loop cargo transport platform for transporting the units of fossil; 70 - human passage; 71 - a space to accommodate the drive head plate of the conveyor.

Figure 11. Crushing chamber, a vertical incision; 72 transport platform with a block of fossil at the point of discharge; 73 - winch to move a block of fossil into the crushing chamber; 74 crushing chamber; 75 - crushing machine with the Executive instruments in the form of a pneumatic drill rods; 76 - venting the cavity in the chamber; 77 - pipe flue methane on the surface; 78 cargo trolley with bottom unloading placer minerals; 79 - mountain bunker for placer minerals; 80 - belt conveyor.

Figure 12. Technological scheme of wastewater treatment works with a fossil in the face of large blocks, the ID in the plan; 72 transport platform with a block of fossil at the point of discharge; 73 - winch to move a block of fossil into the crushing chamber; 74 crushing chamber; 77 - pipe flue methane on the surface; 78 cargo trolley with bottom unloading placer minerals; 79 - mountain bunker for placer minerals; 81 - field belt slope; 82 - 2-track Plast haulage drift with the electric hauling; 83 - loading point lava loading fossil placer from operation of the plow bottom bomb it; 84 - plow; 85 - bottom bomb it; 86 loading item lava with loading blocks on fossil transport platform; 87 - electric machine cutting back vertical cracks; 88 - electric machine cutting the top of the slit on the edge of a roof; 89 - plate conveyor; 90 - gitarijada treatment machine.

The technology described in this invention, as in the prototype complex-mechanized, wide and circular. In the technological cycle of production of fossil large blocks unlike the prototype production processes: plow undercut of the bottom layer and cut from the top of the blocks fossil using electric machines, gidratnoi cleaning machines are executed in parallel.

The creation of the lower Podravka reservoir

The lower bomb it p the Acta is to create a cavity under the removable blocks to move in her delivery means for issuing units on fossil transport development. This allows to simplify the loading of extracted blocks on the plate conveyor. The lower bomb it is created by operation of plow Assembly comprising: a plow, scraper conveyor and they are used (see Figure 1).

This is a known and well-established structural diagram of a plow. The difference in this invention consists only in the fact that due to the low height of Podravka support for the work they are used is not powered roof support, and hydraulic shoring "Sputnik".

Cutting lengthwise along the length of the lava back vertical and the upper border of the roof gaps electric machines and idle driving

Cutting lengthwise along the length of the lava back vertical and the upper border of the roof of the slits is made for the purpose of separation from the rest of the array produced by this cycle its bottom part and lowering her on becoming the plate conveyor. Cutting both slits simultaneously cutting bars electric machines during their continuous movement along the lava from traffic generation to ventilation, regardless of the operation or the stop of the delivery conveyor. After cutting slits electric machine without changing the position of the cutting bars make idle stretch along the length of the lava with the conclusion of both bars in the window lava. Moving electric the machine at idle is as freeing up space on the delivery conveyor by moving the cut bottom of the array in the lower part of the lava cutting it transverse cracks and overload cut blocks on fossil transport output.

Electric cars are moved along the metal rails laid parallel to the delivery conveyor (see Figure 1), on the trucks.

The rear vertical slot 13 is cut with the cutting bar 11 from the electric machine 9, which is located on the side of the cart, so that the cutter bar is in a vertical position.

The upper gap on the border of the roof layer 16 (see Figure 1) is created by operation of the cutting bar 15. The movement of the cutting chain bar is provided by rotation of the vertical shaft 12 from the electric machine 14.

Cutting transverse slots

Cutting a transverse slit is made in order to obtain a fully carved blocks of fossil. Cutting transverse slots is stationary gidratnoi machine, located in the lower part of the lava in the area of the linear sections of the delivery means.

Cutting a transverse slit in the array fossil is abrasive Gidrostroy (see Figure 2) when moving waterjet cutting heads in the cavity between the roof of the reservoir and the surface lying on delivery tool array fossil. The water jet emanating from the cutting head, is directed vertically downwards and moving the head cut a vertical slit depth up to 1.2 is in the body of the array fossil, located on the hauling vehicle opposite the stationary set of Executive devices.

Moving the cutting head is made from the surface of the bottom into the cavity until it ends.

Figure 2 presents the device one node hydrorise Executive instrument. Hydrorise site consists of a waterjet cutting head 23, a metal water pipe high pressure 24 to the cutting head, a flexible tube feeding abrasive 25 from a supply hopper for abrasive 28, and horizontal rails 26 and 27 vertical movement gitorious nodes.

To ensure high performance cross hydroretake simultaneously cut six cross (see figure 3) slots. For this purpose, the actuator hydrorise machine has six gitorious nodes. Water ultrahigh-pressure (SVD) is applied to gitorious nodes through line 32, arranged from a metal tube. The highway is located on a horizontal platform 31, which is on the trolley can move along the horizontal guide 26 (see Figure 2). After cutting a transverse slit in the body fossil to a depth of 1.2 m horizontal platform 31 is lowered down along the guides 27 (see Figure 2). This hydrorise head 23 all nodes are inside protanyla and during the reverse movement horizontally is deepening transverse cracks up to full dissection of the body fossil, located on a plate conveyor.

After cutting 6 transverse cracks and output of them out gitorious heads included in the work plate conveyor and is overload cut 6 blocks on fossil transport platform, and place on a plate conveyor opposite gitorious nodes is the next part of the body fossil to be cut off from him the following 6 units of fossil.

Water ultra high pressure (300 MPa), which is a high-speed cutting transverse slots in the body fossil, located on a plate conveyor, served in line 32 (see figure 3) by a flexible sleeve length up to 15 m from the power steering located on transport development in the composition of the trains a mine site near the window lava.

Speed-cutting the length of the slits in the body fossil at his fortress on a scale of Professor Protodiakonov 2-3 units is estimated at a value of 5 cm/sec in the formation of a gap depth of up to 1.2 m Therefore, the time for cutting a transverse slit depth of 1.2 m in width electric machine 2.4 m with regard to the fortress of fossil will be 48 seconds. The time of cutting the deepening cracks in the reverse course hydrorise head required for cutting a transverse slit on the depth, accept the same. Have a look at the cost, time to move hydrorise site at its depth in General, the time of cutting the single slit is 2 minutes.

Because simultaneously 6 transverse cracks, the time spent on direct cut 6 blocks from fossil found on the delivery conveyor cut bottom part of the fossil is 2 minutes.

The move cut the bottom hole array plate conveyor when cutting a transverse slit and unloading of cut blocks on the transport platform

Cut the bottom part of the array, remaining behind after the passage of electric cars under its own weight settles on the carrying plate.

Plate conveyor (Figure 5 and 6) includes linear and transition sections, bypass blocks, freight and single branches.

Cargo is transported by conveyor to the load-carrying plates 37, which upon movement based front along the axis of their eyes, and behind the lugs of the adjacent plates.

Axis in turn when driving based on 7 rollers (see Figure 5), moving along the bottoms of the pans scraper conveyors.

Load-carrying plate, as in the cargo, and dry branches in the movement are pushing blades traction chains coming into engagement with the blades of the plates. Traction chains are driven by rotation of the drive sprocket, receiving in turn the rotation of motors and drives.

Reloading the blocks and mineral with a plate conveyor on the platform is carried out using the transfer platform. Transshipment platform consists of a body, mechanized sliding plate and the support structure. The body has a square shape with a width of a square of 2.5 m and a height of 2.4 m and is located above the transport platforms in front of the window lava. The time of the valves of one block in the transfer platform is 2.5 m : 0.5 m/sec = 5 sec, where 0.5 m/s - the speed of movement of the plates of the conveyor.

When congestion blocks the delivery conveyor, moving the load-carrying plate, pushes overload block with fossil bypass unit conveyor to the receiving tray loading platform. Then, forced back the next block of fossil overload block stalkivaetsja in the back of the platform. After a full call of overloaded block in the body is the extension of the bottom of the body in the direction opposite to the direction of movement of the blocks on fossil transport development. The speed of movement of the bottom 0.5 m/sec.

Therefore, the unloading time blocks fossil of a body is equal to 2.5 m : 0.5 m/sec = 5 sec.

So during this time of unloading of the body reloading platform feeder conveyor must be stopped. Therefore the total cycle overload 6 cut blocks consists of 6 stages over one block. Each of these stages consists of 5 seconds delivery conveyor for pushing overloaded what about the block in the back of the platform and 5 seconds stop the conveyor in communication with the discharge unit of the body on the transport platform. Time for the valve plate is combined with the loading block in the body. Thus, the total duration of the overload 6 blocks fossil takes time 6×(5 sec+5 sec)=60 sec=1 min

Then complete one cycle of cutting 6 transverse cracks and overload cut 6 blocks is 2 min+1 min=3 min

The total number of cycles of cutting transverse slots is

200 m to 9.6 m≅20.

Then the length of the cutting transverse slots and unloading blocks fossil is

3 min×20=60 minutes

In this work plate conveyor during this period of time goes by cycles: 2 minutes stop in connection with the cutting of the transverse slits, then the unloading cycle blocks of 6 stages: 5 sec work, then 5 sec stop - 1 phase, 5 sec work, then 5 sec stop - 2-th stage, and so a total of 6 stages, then the cycle repeats. There are 20 cycles. The total length of the cutting transverse slots and unloading blocks of fossil equal to 20×(2 min+1 min=60 minutes

Loading and locomotive hauling blocks

Unloading block is at the loading point as shown in Fig.7 and Fig. Loaded on a transport platform (Fig.9) coal blocks are placed on 2-track haulage transport development (see Figure 10) to the point of unloading 72 (see 11) the crushing chamber.

After retiring from under La is s loaded with blocks under load is poronnik, who was in reserve on the 2nd track.

Figure 10 presents a cross-section storey haulage 2-track roadway used for the transportation of coal produced in the form of large blocks on the transport platforms such title (see Fig.9)moving on the track 900 m with the use of electric locomotives type 28 ARP. To ensure uniformity tractive effort of a locomotive with a Laden or unladen composition haulage drift traversed with a small bias to national transport lines. The locomotive 28 ARP has a hitch weight of 28 TC power traction motors 104 kW, thrust 3420 kg, allowing the locomotive haulage trains with coal blocks weighing up to 15 tons

Used for transportation of coal blocks transport platform type PTAs have considerable capacity, consist of two 4-wheel trucks with a total length of 2750 mm and a width of 1600 mm

Used to transport fossil placer from the bottom Podravka mine cargo trolley bottom 2-way tipping type D 5,6 m have the capacity of a body of 5.6 m3hard base 1500 mm, length 4900 mm, a width of 1350 mm and a weight of 2600 kg

Used for haulage of goods 2-track haulage drift has a section in the light of 17.1 m2the dimensions in the light: height 2960 mm, width at the soil - 5760 mm

Dimensions width: transport platforms is - 1600 mm, trolley with placer fossil 1350 mm, the distance between the movable structures - 250 mm

Distance to wall framing: from platform - 1025 mm from the side of the trolley - 775 mm

On Fig presents the position of the loading points lava loading placer blocks 64 and 61. Loading scattering coming from the work of the plow bottom bomb it in mine cargo trolley is manufactured using material handler 65, under which it is exhausted composition with empty trolleys.

Loading blocks on the transport platform is manufactured using vydatnou head 61 of the plate conveyor and loading platform 62.

7 shows the technology overload block 54 with the cloth plate conveyor to transport the platform. The carrying plate 37, the moving block 54 at the approach to Obvodny block 51 vydatnou head and turning around him, pushed the coal block 54 on the bottom of the loading platform 60. Transshipment platform consists of a body 58 and mechanized sliding plate 60. Block, urged the following in the rear of the unit, fully retracts into the body of the loading platform. Then mechanized wyderka bottom in the direction opposite to the movement of the composition, and the unit is lowered onto the transport platform. After loading block platforms is removed from the stoppers 57 and through they are used 56 are moving the loaded platform, and her place is empty.

The coal bed methane in the crushing chamber

After the arrival of the composition of the transport platforms with coal blocks 72 (see 11) begins their discharge into the receiving window of crushing chamber. The unloading is carried out by means of the winch by moving the coal block from the surface of the platform to the right under the action of the pusher plate, experiencing the tension from the working rope winch 73. Unloaded coal blocks sliding on a steeply inclined surface of the crushing chamber, covered by upper and lower bumper rods 75 crushing machine. The bumper rod 75, rotating under the action of its drive, grind coal blocks in small-sized coal, which ensures maximum extraction of coal bed methane.

Released from coal methane due to the fact that it is lighter than air, rises up and concentrated in the exhaust plane 76, whence it is sucked into the exhaust pipe 77, which creates negative pressure due to a running vacuum pumps. The extraction of methane is also produced from mountain bunker, which also collects the methane gas from placer coal, which there poured from the shaft of freight wagons with bottom unloading.

The exhaust pipe is laid along the inclined vent hodka covered by reservoir and intended for the idaci outgoing air flow from the ventilation treatment and mine preparation works.

Alluvial coal supplied from the crushing chamber and from the mountain bunker, gets on the belt conveyor, mounted on a field conveyor incline, and moves through the system of mining of the main conveyor to the skip shaft for delivery to the surface.

Technological scheme of treatment works with excavation of coal in the large lava blocks and efficient methane production in the crushing chamber

Presented at Fig technological scheme of treatment works with excavation of coal in the large lava blocks and their transportation locomotive transport to the crushing chamber allows to obtain powerful and stationary source of methane for the purpose of disposal on the one hand and to ensure the security of wastewater treatment works on gas factor on the other side.

According to the presented technological scheme Fig sewage treatment works in the lava is currently ahead of the main bottom face of the lower Podravka, as shown in figure 1 and 12.

Excavation of coal in the bottom of the lower Podravka 85 is plow 84. Shipping coal from the plane made by the scraper conveyor. Delivered alluvial coal at the loading point 83 is discharged to the loader, as shown in Fig. Alluvial coal loader enters the mine truck trolley with bottom discharge. After full loading of the latter with p the power of the locomotive is moving to the point of unloading 78, where discharge placer coal mining hopper, as shown at 11. From a mountain bunker in the future, this coal is unloaded onto the conveyor belt 80 (11)installed in the field conveyor incline.

After moving the bottom of the lower Podravka in the direction of podvigina lava on the distance of the width of the plate line is created along the length of the lava cavity slid plate conveyor, as shown in Figure 1.

Together with the conveyor is moving the rest of abatement equipment lava: electric machines, along with their channel guides, gidratnoi cleaning machine, together with ensuring pumping stations, mechanical support and equipment loading point.

After the shifting of pollution control equipment starts working coal-cutter for cutting along the length of the lava longitudinal cracks: rear vertical and the upper boundary (see 11). The depth of cutting the top of the slit corresponds to the width of the plate conveyor. In the cutting of slits cut the bottom part of the coal massif lies on becoming the plate conveyor.

After the release of electric machines from the bottom of the lava starts cutting transverse slots cut in the bottom part of the array, located in the lower part of the lava. orezanie transverse cracks is water jets gidratnoi machine (see 2). At the same time cut six slits (see figure 3)that provides simultaneous receive 6 coal blocks, ready for unloading at the transport drift.

Fresh air for ventilation treatment works supplied by mechanized way and check in on haulage drift 82, and then into the lava. Outbound vent stream of lava flows in the ventilating passage lava, then through the crossing takes inclined ventilation Walker.

The length of the production Nikl and performance stope

When the plow on education in the developed reservoir bottom Podravka performance is determined by the thickness of the chip and the speed of movement of the plow. Focusing on the use of planes of the Russian production of types of CO or CH, possible chip thickness can be found by the formula [1]

where Ap - resistance layer cutting, kgf/cm;

Hc- the height of the plane, m

When the broad application of the technology of extraction of large blocks of the cutting resistance should be not less than 150 kgf/see

The height of the plane Hcis determined by the height of the lower Podravka - 0,6 m

The values a, b and C according to [1] equal to planes of type CO and CH

and inC
CO130,026,93
CH13,30,025,62

For podvigina plow bottom to 2.4 m (width electric machine), you must initiate the removal of shavings 240 cm : 7 cm = 34.

When the speed of the plane type SN 1.89 m/s duration of execution of one chip 200 m : 1.89 m/s = 106 sec = 1,76 minutes

Then the duration of the withdrawal 34 shavings and podvigina plow bottom to 2.4 m equal to

1,76 min×34=59,8 minutes

According to the technical characteristics of the working feed speed electric machines "Ural 33" - 2,82 m/min, However, given that moving electric machine is mounted on a wheeled cart on channel guides, and cutting slits electric machine is in a well-pressed array, real working feed rate will be no less than 1.5 times more and will be 4.2 m/min With this in mind time of cutting slits will be:

200 m : 4.2 m/min = 47,6 minutes

The duration of portania transverse cracks and unloading blocks on the haulage drift is 60 minutes

Thus, the duration of one cycle is the limit of the x one hour of time.

The amount of fossil per cycle is

m·γ·r·lπ

where m is the reservoir thickness, m

γ is the volumetric weight of a fossil in the array t/m3

r - width or podvigina per cycle, m

lπ- the length of the lava, m

During the development of the reservoir capacity m=3 m lava length of 200 m with a width of electric machines 2.4 m and a bulk density of fossil γ=1,4 t/m3the volume of production from one cycle extraction is

3.0 m×1.4 tons/m3×2.4 m×200 m=2016 so

When working a mine site in mode three production shifts per day 6 hours total time production is 18 hours.

When the duration of one cycle for the extraction of 1 hour per day in a mining face is 18 cycles with a total production

2016 t×18 cycles=36288 tons/day

Thus, the performance of the stope in the use of this invention is 36 thousand tons per day.

Volume of production of methane from a coal seam when one stope

Determine the annual methane production on the example of the mine, producing a single flat layer of coal with a capacity of 3 m and a gas 25 m3/t, which is typical for southern Kuzbass mines. Assuming that mine is the one cleaning the face with a capacity of 36 thousand tons of coal per day and recycles 80% of methane in extracted coal, obtain

With 300 days of production per year annual production of methane due to the work of one stope will be

720 thousand m3×300=216000 thousand m3=216 m3CH4/year

Bibliography

1. Progressive technological scheme of reservoir development in coal mines. IGD them. Ass. M. 1977

1. Method of underground mining of bedded deposits of minerals in large blocks, including the advanced education of the lower Podravka layer plough Assembly moves in her delivery conveyor for the issuance of lava cut from above rectangular blocks fossil by cutting longitudinal and transverse cracks using supports, characterized in that the issue of fossil placer from the work plane is a separate scraper conveyor, with the plow in the bottom Podravka occurs simultaneously with the cutting blocks fossil from the upper part of the formation by cutting longitudinal and transverse cracks electric machines and loading issued from lava blocks fossil loading platform, and locomotive hauling from lava to the point of discharge into the crushing chamber.

2. The method according to claim 1, characterized in that the entire length of the longwall cutting longitudinal slits: rear vertical top and along the border with roofing performance is by cutting bars electric machines, moving on metal rails laid parallel to the line of the delivery plate conveyor, used for the issuance of lava cut blocks fossil.

3. The method according to claim 1, characterized in that the cutting transverse slots is fixed gidratnoi machine at the bottom of the lava from the haulage drift.

4. The method according to claim 1, characterized in that the overload block with fossil delivery conveyor lava on the vehicle on the haulage drift is performed using the transfer platform with the use of mechanized vidivici bottom.

5. The method according to claim 1, characterized in that the transportation carved in lava blocks is made of locomotive transport haulage drift using electric locomotives and special vehicles.

6. The method according to claim 1, characterized in that the methane gas extracted from coal produced in the crushing chamber arranged outside fresh air supplied for ventilation lava.



 

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FIELD: mining.

SUBSTANCE: method includes driving of development-temporary workings, working off of primordial chambers of tapered section, their filling with curing mixture forming artificial pillars, formation of massive ore pillar between artificial pillars. Rock pressure is reallocated on artificial pillars. Touchdown working is driven along ore pillar symmetry axis by contact with ore deposits in overlying roof rocks. Blasting wells are drilled from it radially within outlines of natural arches so that ends of these wells most accurately form sizes and surface of line of natural arches in compliance with estimated ultimate strength of overlying rock massif. Complete discharge of massive ore pillar is performed by induced caving of roof rock between artificial pillars on chambers expanding upwards, support of artificial pillars by caved rock is provided. Massive ore pillar stocks are developed with support of overlying roof rock by natural arches resting upon artificial pillars and retaining slopes formed near side surfaces of artificial pillars during loading of broken ore.

EFFECT: increasing reliability of rock pressure control and labour safety.

2 cl, 4 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to mining and may be used in ore dressing. Proposed complex comprises receiving hopper, crushing and screening unit, assembly to feed ore to separation, ore control station, ore lump separators, concentrate and reject discharge conveyors arranged in underground openings. Assemblies feeding ore to separation and X-ray-type separators are arranged on two levels in long openings communicated by box holes to accumulate and feed ore to separators by gates arranged at their outlets. Said box holes are located at 5-7 mm from each other to feature diameter of 1.0-1.5 mm. Assembly feeding ore to separation represents combination of openings, each being 120-40 0m-long and having 2.5-3 m-diameter, and connected with crushing and screening assembly to allow every opening to feed ore of particular size grade to box hole. Every separator comprises, at least, one additional channel for cleaning rejects after separation of concentrate in main channel. Conveyor belts of said main and additional channels are located one above the other. Openings accommodating said assembly feeding ore to separation and separators are spaced apart for 15-20 m along vertical. X-ray-type separator channel comprises, at least, one x-ray useful component content analyser connected with separation device made up of, at least, one pneumatic blowout nozzle. Every aforesaid assembly is equipped with conveyor provided with unloading device driven along openings length. Crushing and screening unit allows producing four flows of ore sized to (-300+120), (-120+50), (-50+15), (-15+0) mm, with (-15+0) mm-ore directed to concentrate discharge conveyor, the remaining flows being used for filling box holes.

EFFECT: higher efficiency of separation and quality of concentrate, reduced costs.

8 cl, 3 dwg

FIELD: mining.

SUBSTANCE: method to increase stability of a ceiling in downward slicing development of a deposit with backfilling includes serial tunnelling and backfilling of parallel mines - stope entries, leaving ore pillars with width equal to one, two or three spans of mines, backfilling of mines with a concrete mix, and after backfilling hardens, ore pillars left between concrete strips are mined. At the same time the vault of stope entries is arranged as deep, besides, ore pillars are left in the roof between concrete backfilling of adjacent stope entries.

EFFECT: higher stability of a mine ceiling.

4 dwg

FIELD: mining.

SUBSTANCE: extraction sections or blocks are mined with vertical cuts including two vertical layers of various thickness, the internal one of which is mined by means of drilling method of large-diameter scavenger wells and external one is not mined. In order to ensure safe labour conditions at upper drilling level and uniform output of mineral deposit extracted during large-diameter well drilling, drilling of those wells is performed by shrinking of broken mine rock in them. If the deposit is represented with a bench of conformable beds, the cutting height is accepted equal to total thickness of all beds of that bench, including intermediate rocks. Drilling of scavenger wells is performed throughout the cutting height with shrinkage of broken mine rock in them, and separation of mineral deposit and hollow rock is performed at the stage of general release of racks by means of selective bed-by-bed supply.

EFFECT: creation of safe conditions from the point of view of hydrogeology for high-efficiency development of reserves of extraction sections or blocks outlined with natural or artificial barrier or inter-block pillars.

3 cl, 2 dwg

FIELD: mining.

SUBSTANCE: weakening a spring of natural balance at both sides of the block and damaging a key stone is done simultaneously by exploding rows of parallel wells drilled at the borders with interchamber sight pillars and along the axial line of the stope, in sections length of which is equal to the thickness of the damaged layer. Weakening of the spring at both sides of the block and damaging of the key stone is done by sectional explosion of clusters of parallel adjacent wells: linear ones at borders with interchamber sight pillars and bulk ones along the axial line of the block. The spring at both sides of the block is weakened ahead of erection of artificial interchamber sight pillars.

EFFECT: improved efficiency and safety of production works.

3 cl, 4 dwg

FIELD: mining.

SUBSTANCE: when developing mineral deposits in the form of ore bodies, ore zones are divided along the depth into stories and levels and are mined top-down with sloughing of the above rock massif or filling of the mined space with foreign ground material with lower strength and resistance of rock massif. Ore bodies are mined bottom-up with a layer method with the limited minable width of the layer using the bore hole method from drilling crosscuts with application of drilling mechanisms and conveyor transportation of ore material. Parameters of the broken layer comply with receiving capacity of conveyors that supply the material into the ore chute, and from there into the transport lifting vessel. Mining is carried out starting from the hanging wall of the deposit, and gradually, layer by layer is mined towards the underwall of the deposit. To collect the material sliding off the conveyor flight and during mining of intermediate layers between the extraction ones along the height and ground later, trenches are developed at the bottom. From the trenches the material is sent to a common conveyor via chutes.

EFFECT: complete mining of the deposit, prevention of weakening in the surrounding massif of the mined space.

16 dwg

FIELD: mining.

SUBSTANCE: air supplying gate and the main air gate pass along opposite boundaries of mine field so that they run ahead of extraction front through the length equal to distance between axes of the rooms. At that, rooms have the length equal to width of mine field and are located between air supplying gate and ventilation air gate. Fresh air is supplied through the tunnel located in front of extraction front. At that, return ventilation air is removed along auxiliary air gate.

EFFECT: improving concentration of mining operations, reducing volumes of preparatory mine work, and decreasing air leaks through the worked-out area.

1 dwg

FIELD: mining.

SUBSTANCE: method consists in maintaining the stable state of worked-out area with inter-chamber support pillars; at that, sizes of inter-chamber support pillars are determined from actual pressure of rocks on them, which are located inside the natural arch in its final position, and the pillar located at the joint of natural arches is determined considering the pressure on abutments of arches of those rocks which are located above the outlines of natural arches.

EFFECT: reducing the losses of developed mineral resources and improving the safety of mining operations.

2 dwg

FIELD: mining.

SUBSTANCE: method for development of thick flat beds of minerals includes division into layers, arrangement of development openings in upper and lower layers, strengthening of development openings. Layers are developed downstream in longwalls. Development openings of lower layer pass under edge portion of bed, formed in process of upper layer longwalls development. Prior to arrangement of development openings in the lower layer, edge part of bed is weakened over route of development openings arrangement in the lower layer, for instance, by means of wells drilling in bed or creation of slot in bed. Development openings of the lower layer are fixed by anchors, at the same time depth of bed weakening is accepted as larger than width of development opening in the lower layer. Length of anchors is accepted as larger than distance from lower layer openings to bed roof, and depth of bed weakening above route of lower layer development openings arrangement is determined from the expression.

EFFECT: invention makes it possible to reduce labour intensiveness of works and costs for strengthening, to increase speed of development openings arrangement.

2 cl, 2 dwg

FIELD: mining.

SUBSTANCE: invention may be used to develop bedded deposits, for instance potassium ones, in case of reverse order of mining with unstable immediate roof. In process of panel preparation, tunneling combine is used to arrange one transport, two ventilation drifts and also mined slots on workable beds for the whole length of panel. Conveyor drift is tunneled with cutter-loader in sections as mining front advances. Stopes are mined on one of half-panels from conveyor drift. Transport drift is expanded by cutter-loader to section of its working element by periodic cuts, as mining front advances by the length multiple of distance between axes of stopes. During preparation of panel, ore passing wells are drilled from field conveyor drift down to design elevation of bed conveyor drift soil, and these wells are opened when conveyor drifts are tunneled on mined beds, as mining front advances. Distance between ore passing wells is selected as multiple of distance between axes of chambers.

EFFECT: invention makes it possible to significantly reduce scope of mining-preparation works required to commission the panel, and to reduce time of its preparation.

8 cl, 2 dwg

FIELD: mining industry.

SUBSTANCE: method includes use of screw-drilling machine for driving of several first ventilation shafts in ore body and driving several second shafts, while second and each second shaft crosses, at least, one matching first shaft, forming first support walls, supporting ceiling. First supporting ceilings consist of ore body zones between neighboring second shafts, each first support wall has portion of at least one first shaft, passing horizontally through it. Horizontal channels are formed, each of which is placed transversely to matching second shaft between appropriate portions of first shaft, formed in adjacent support walls, for forming of group of continuous ventilation shafts. Second shafts are filled for forming second supporting walls, supporting well ceiling, and first supporting walls are extracted. First ventilation shafts can be made parallel to each other. Second shafts may be directed perpendicularly relatively to first ventilation shafts. In ore body air-outlet and air-inlet ventilation mines can be formed, placed at distance from each other along horizontal line, while first or each first ventilation shaft passes through portion of ore body between air-inlet and air-outlet ventilation mines. Driving of second or each second shaft can be performed by cutting machine, or by drilling or explosive mining.

EFFECT: higher efficiency.

7 cl, 11 dwg

FIELD: mining industry.

SUBSTANCE: method includes partial filling of extracted space of side and central mains by filling stripes from lava extracting shafts. At center of semi-lava on the side of massive, wherein next extractive column will be cut, filling shaft is additionally driven, wherefrom full filling of space between central fill stripe and fill stripe on the side of massive is performed. Preparation of next extraction column is performed under protection of erected fill stripes.

EFFECT: higher safety, higher efficiency.

1 dwg

FIELD: mining industry.

SUBSTANCE: method includes cutting well field portions by driving bed and field mines. At mine fields to be prepared with weak rock stability driving of several field preparatory mines is performed at portion of field with width determined from formula. Bed preparation mines on same portion are driven alter, with displacement of cleaning operations from these may be driven in portions, at which their stability is provided for technological time period with inter-drift blocks of given rigidity.

EFFECT: higher safety.

2 cl, 1 dwg

FIELD: mining industry.

SUBSTANCE: method includes extraction of mineral resource by underground mine method in liquid environment, under protection of water-resistant rock massif. Full flooding of auxiliary extracting and preparatory mines is performed, which provide for start of wiping operations, with working liquid, neutral relatively to mineral resource and enveloping rocks and being under pressure, matching value of pressure at depth of mine. Process of removal of separated rock beyond underground flooded space is synchronized with replenishment of working liquid volume in this space. Working liquid pressure can be formed by effecting it with force liquid, which is placed either in mine shaft, hydraulically connected to lower flooded auxiliary extracting mine, or in mine shaft and force column, placed on earth surface, above mine shaft, and hydraulically connected thereto. Required height of force liquid column is determined from mathematical expressions. After mineral resource extraction is finished within mine field, flooded extracted space is used for placement of toxic and non-toxic wastes of industries or strategic objects, while process of transfer of wastes or strategic objects into liquid environment is performed synchronously with removal of working liquid beyond flooded space in volume, equal to volume of transferred wastes or strategic objects.

EFFECT: higher safety.

3 cl, 1 dwg, 1 ex

FIELD: mining industry.

SUBSTANCE: method includes separating resources of all levels on blocks, in form of upwardly elongated hexahedrons. Blocks on adjacent levels are positioned in staggered order with displacement of some of them relatively to others for half of blocks width. Resources of each block within limits of hexahedron are divided on two portions: hexagonal chamber inside the block and block itself of same hexagonal shape on all six sides of chamber. Preparation and cutting of chamber resources is realized by driving field level drifts and mines, intermediate sub-level drifts and mines, and also level and sub-level orts and drifts, driven through mineral resource, from which resources of chambers and blocks are drilled and exploded. Extraction and outlet of mineral resource is performed in three rows - first chamber resources, than inter-chamber blocks under protection of ceiling blocks, after that ceiling blocks deposits. Outlet of resources from chambers and blocks is performed trough ends of level orts and mines, an also through ends of intermediate sub-level mines.

EFFECT: better use of mineral resources, lower laboriousness, lower costs, decreased block preparation time.

2 dwg

FIELD: mining industry.

SUBSTANCE: method includes determining width of edge zones of block, subjected to influence from support pressure, then preparatory mines are driven along block at limits of these zones and permanent rigid supports are erected therein. After that portion of block from preparatory mines to block center is extracted.

EFFECT: increased mineral resource yield coefficient, safer extraction of inter-panel support blocks, without breaking their carrying ability and without using backfill materials.

2 dwg

FIELD: mining industry.

SUBSTANCE: method includes dividing a level on hexahedral sections of upwardly elongated shape and is prepared by driving of field backup drift. From drift below each section shafts are driven, from which along mineral resource ascending shafts are drilled. For drilling chambers deposits by wells, sub-level drift is driven along mineral resource, access to which is provided by driving field sub-level drift and shafts. Outlet of extracted rock is performed through ends of shafts. After letting out rock from all sections ceiling beam is brought down and also let out through ends of shafts.

EFFECT: lower laboriousness, lower costs, higher efficiency, higher personnel safety.

2 dwg

FIELD: mining industry.

SUBSTANCE: method includes separation of a level on hexahedral sections of upwardly elongated shape and is prepared by driving of field backup drift. From the drift shafts are driven below each section, from which along mineral resource ascending shafts are drilled, meant for drilling from them by horizontal or slanting wells and extracting sections resources. Outlet of extracted rock mass is performed through ends of shafts. After outlet of rock mass from all sections ceiling beam is brought down and let out also through ends of shafts.

EFFECT: lower laboriousness, lower costs, higher efficiency, higher personnel safety.

2 dwg

FIELD: mining industry, particularly methods of underground mining.

SUBSTANCE: method involves advancing breakage face in under-roof layer; drilling bores in the under-roof layer and injecting weakening reagent to separate zones through the bores; drilling blind drift in front of the breakage face, wherein the blind drift has length of not less than breakage face length; drilling bores for following weakening reagent injection from the blind bore; additionally boring intermediate bores between above bores for following gas exhausting; performing under-roof layer development so that non-developed bank is left directly above breakage face support; performing stepwise weakening reagent injection into corresponding bores and evacuating gas from intermediate bores; leaving bores filled with weakening reagent for 1-2 days and supplying the weakening reagent into intermediate bores.

EFFECT: increased efficiency of mineral preparation.

3 cl, 3 dwg

FIELD: mining, particularly methods of underground mining.

SUBSTANCE: method involves cutting mineral by hydrocutting machines and headers from face massif in rectangular blocks; putting on metal cases on the blocks to facilitate loading-and-unloading operations and transportation; loading the cut blocks on hauling truck along side previously opened from breakage face side, wherein the truck position is fixed by spacing apart hydraulic post permanently connected to the hauling truck; moving loaded hauling trucks inside breakage face by hauling tracks along channel, V-shaped guiders or guiding rails with the use of haulage cargo winches arranged in berms near conveying tunnels or with the use of independent drives, wherein the conveyance is carried out to conveying and venting tunnels abutting the breakage face; loading mineral blocks from hauling trucks onto wheeled transport platforms without block turning for following transportation. Distance between rail tracks is equal to rail track width to transport blocks on paired wheeled platforms in which locomotive moves along medium track. Working area face is strengthened by individual hydraulic posts and metal hydraulic jacks and metal roof bars or by mechanized face support. The face support has fastening sections including above hydraulic jacks and roof bars, as well as wheel guiding means sections and hydraulic movers with control panel arranged on each fastening section pair. The roof is controlled by partial filling the excavated space with mineral blocks. Distance between neighboring mineral units arranged on one paired wheeled platform and on adjacent platforms may be identical and equal to distance between guiders in breakage heading. Mineral blocks are cut in several rows, wherein depth of slot at seam ground and roof is two times as thickness of mineral blocks to be cut.

EFFECT: increased output, improved safety and ecology.

3 cl, 14 dwg

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