Development method of thick gently sloping formation in large slabs

FIELD: mining.

SUBSTANCE: method involves formation of lower slashing of formation by means of a plough unit with movement into it of a hauling conveyor, cutting in bottom-hole massif of a rear vertical slot and a slot that is upper along the boundary with the roof, which are longitudinal throughout the face length, lowering of the massif onto the conveyor, splitting of a mineral into slabs, output of the mineral from the face in slabs, their lowing into trolleys and locomotive haulage to a bulk material crushing chamber. In the massif settled down on the conveyor there cutout are inclined transverse slots splitting the massif into inclined layers that are then transferred to horizontal position for splitting of the mineral into slabs. Cutout of vertical transverse slots is performed using a motor-driven multi-jib machine.

EFFECT: high efficiency of a mining face, maximum extraction of mineral deposits from the formation being developed, extraction of methane from the produced mineral, safety of second working as per gas factor and sanitary-hygienic conditions of underground production as to dust.

2 cl, 2 dwg

 

The invention relates to mining in the development of thick and flat seams. When developing a powerful gentle fossil layers in a single layer leads to significant loss of minerals [1], because it completely remove the existing methods fail. Most often, the upper one fossil or not is extracted and goes into sabot or extracted from large losses if the technology of production of fossil from the roof strata on the second conveyor with sacrebleu side of the lava.

If fossil prone to spontaneous combustion, the remaining developed in the space of fossil ignites spontaneously, which leads to the underground fires and getting into the mine atmosphere of carbon monoxide. According to the safety regulations of the mining work should stop until you have extinguished the fires. An example of this is the situation in the mines for them. Lenin, "Olzherasskaja-New", "Sibirginskij" coal company "southern Kuzbass", where he developed a gentle coal seams with a capacity of 7.5-10 m with coal, prone to spontaneous combustion. Due to the cessation of mining operations at the occurrence of an underground fire company is a big loss for a long time deprived of a large number of people. Up to this time there is no effective and safe technology for fossil when its occurrence m is Snimi sloping layers.

In this application the invention proposes a method of developing a fossil from a thick flat layer with excavation and transportation of large blocks of locomotive transport to the crushing chamber. Closest to the application is the patent for the invention "Method of Professor Kaimana underground mining of fossil large blocks (patent RF №2459078 C1 IS 41/16 2006.01). The fossil is of large blocks with outrunning the main face by creating a lower Podravka seam along the entire length of the longwall plough unit. Excavation of large coal blocks is carried out from the upper part of the formation by cutting longitudinal slits: rear vertical and the upper boundary of the reservoir rocks of the roof along the length of the lava. Simultaneously, the lower part of the lava on the border with the haulage drift is a cross-cutting vertical slots already cut in the bottom array fossil. Cutting transverse slots being gidroliznyi jets of water high pressure directly on the plate conveyor. Cut blocks with a conveyor to move material handler, and then one arrives at the truck, which is loaded into the cart. After downloading blocks only the latter goes into the crushing chamber for processing blocks in rossinow mass.

Technologists who, shown in the patent, taken as a prototype, is difficult to apply when developing powerful sloping strata of fossil. When developing coal seam 111 capacity of 10 m (mine them. Lenin company "southern Kuzbass") after the lower Podravka with a maximum height of 2 m still the height of the cut bottom of the array is very large, equal to 8 m Height cut from it blocks will be equal to 8 m Such blocks cannot be transported because the height of the haulage drift does not exceed 4 m, as well as to transport these units no vehicles and equipment for cargo handling.

The purpose of the invention is to create a technology fossil from thick flat seams, provides:

- high performance stope;

- the observance of the MPC according to the safety rules associated with methane extraction;

- 100%extraction of fossil during its production, does not allow for leaving him in the developed space, leading to the emergence of underground fires.

According to the submitted application development method fossils, thick flat-lying layers is parallel to the following technological processes:

- ahead of the main face holding the lower Podravka layer plough Assembly stood in the e plow and scraper conveyor;

the lower bracket Podravka plow mechanized support;

the electric cutting machines along the length of the lava back vertical and the upper boundary with the breed of the roof of the formation of longitudinal cracks;

- cutting in settled on becoming the plate conveyor bottom array of inclined shear cracks third electric machine, moving along an inclined ramp;

- moving the cut out in the bottom hole array inclined fossil layer in a horizontal position on the plate loader;

- cutting enrolled in a horizontal position inclined fossil layer into separate blocks by cutting a transverse vertical slots mnogomodovoi Pereguda machine;

- work plate loader to move the cut blocks fossil onto the discharge conveyor located them in one line from the haulage drift;

- work unloading conveyor for moving on his rod blocks fossil alternately one on the truck;

- the loader when loading one of the blocks fossil in specvagone and shifting composition for replacement under the loading point lava loaded specvagone on empty;

- Laden compositions specvagone with blocks fossil on haulage drift and the initial excavation to the point of unloading at the ramp into the crushing chamber and the movement of empty trains back;

the shifting of the sections of powered roof supports, following the movement of electric cars cutting through the upper slits after subsidence bottom of the array on the conveyor lava, mount exposed roof by spreading on the roof of the nozzles above the ceiling of shields.

After the issuance of the lava of the total volume of fossil in the form of large blocks is front shifting of the plate conveyor and both loaders together with all electric cars, trolleys, racks and channel guides by which they are moved. Together with them also move to the handlers of both brummelen by cutting longitudinal slits and the loader. Front shifting is done by shifting the entire Foundation, where is all this equipment in the lava and on adjacent berms. The shifting is performed by simultaneous extension of the rods of hydropredict of shields along the length of the lava.

The invention is illustrated by drawings, each of which shows the following:

Figure 1. The location of the equipment in a mining face, the cross-section of lava; 1 - space lower Podravka; 2 production; 3 - plow shield support; 4 - plate conveyor lava; 5 - cut bottom array fossil; 6 - brumalia cutting the rear vertical cracks; 7 - W is ellerie guides bromaline cutting back slit; 8 - cutting bar bromaline cutting back slit; 9 - the cutting part and the electric bromaline cutting the top slot; 10 - rear vertical slit; 11 - supply part and the electric bromaline cutting the top of the slit; 12 - cutting bar bromaline upper slit; 13 - upper gap on the border of the reservoir rock of the roof; 14 - channel rack guides for cutting through the upper slit; 15 overpass to bromaline upper slit; 16 - guide to move racks of bromaline the top of the slit.

Figure 2. Cutting cut the bottom hole of the array of fossil blocks, cut along the length of the lava; 4 - plate conveyor; 5 - cut bottom array; 17 - electric machine of the inclined cutting transverse slots; 18 - inclined cut the fossil layer; 19 - circular traction device for moving electric machine along an inclined ramp; 20 - mobile inclined ramp for cutting through inclined slots; 21 - plate loader for cutting blocks of fossil; 22 - megobroba machine; 23 - cutting the bars mnogomodovoi machines; 24 - cut blocks fossil; 25 handling crane; 26 blocks fossil, coming out of the lava for loading.

The fossil large blocks allows you to extract it from the mined seam in the amount of 100%, leaving nothing in the developed space, what is very important is to prevent underground fires due to spontaneous combustion of fossil, remaining in the developed space.

The technology development of thick flat layer of large blocks consists in cutting the entire bottom of the array fossil produced in one process cycle while cutting it into separate blocks from the haulage drift and moved to the cutting area is not yet cut cut part of the bottom of the array. Of lava issued for loading blocks of fossil, ready for transportation. Blocks fossil transported by trains loaded specvagone on haulage drift and bypass generation battery electric locomotive type ARP to the crushing chamber, outside traffic fresh air supplied for ventilation of sewage treatment works. In the crushing chamber blocks fossil processed in rossinow mass, which mine transport goes to the trunk and thrown to the surface. If fossil coal or Slaney containing combustible gas methane, when crushing blocks in Malorossiya mass in a large number of outstanding fuel gas. The crushing chamber is isolated location, in which the surface of the well was drilled, equipped with a tube for sucking the fuel gas. When gas fossil 25 m3/t, which is typical for sverhkategorijnyh mines of Kuzbass, the production of fuel gas which makes up a quarter and more than a billion cubic meters per year.

The fossil large blocks of thick flat layer is love a length of 150 m with education on both sides of the berm width up to 5 m and from the haulage drift niche width not more than 1-1,5 m and height at full capacity of the reservoir. In the lower part of the formation work strogogo slaughter constructed bottom bomb it ahead of the main face. Height Podravka is taken from the condition of preserving bottom of the coal mass at his landing on the plate conveyor, but not less than 1.2 m from the soil reservoir. Mount Podravka is mechanized plow lining.

At the beginning of the technological cycle of production after advancing plow lining the entire length of the lava in the free space of the lower Podravka hydropericardium support units of the main face plate slid conveyor 4 (figure 1) and both the loader 21 and 25 (Figure 2), located him in one line and adjacent from the haulage drift. Together with them in the lower bomb it pushed all bromaline working with downhole and dam sides of the face conveyor, together with their channel guides 7 and 14 (Fig. 1) and moving them carts and racks, as well as the handlers and forklift. In the initial position before the loop begins cutting parts of the first two brummelen cutting longitudinal slits must find the change in the niche. While cutting bar bromaline cutting the rear vertical slots must be transferred from the initial transport position to a vertical operating position 8 (Figure 1) for cutting through the cracks over the entire layer thickness. Similarly, the cutting bar bromaline 9-11, still in the niche, should occupy a working position 12 on the border of the reservoir rock of the roof. The advancing front is simultaneously along the entire length of the lava extension rods of hydropredict all sekciyah mechanized lining the main face. The shifting is combined with a no-moving brummelen from the previous cycle and bringing the cutting bars from the transport position into the working position.

After advancing conveyor line begins working stroke of bromaline 6 (1) cutting the rear vertical slots 10, followed with a lag of 5-10 m starts working stroke of bromaline 9-11 by cutting the top of the slit 13 to the border with layer top. Electric machine 6 and 11 are moved by trucks on channel guides, respectively, 7 and 14. Mechanization shifting is provided by the work feeding parts brummelen having toothed engagement with the toothed racks mounted on each side plate of the conveyor on both sides. The feed rate of coal-cutter 2,81 m/min according to the technical characteristic of the electric machine is us "Ural-33", produced Kopeysk the plant. The cutting part 9 has its own drive. Increasing the load on the electric bromaline 6 due to the increased length of the cutting bar to 8.5 m in comparison with 2.2 m according to the technical characteristic is compensated by the decrease of the thickness of the cut slit from 140 mm to 40 mm Repack power cables when moving both brummelen produced their own handlers.

Following the passage of bromaline 9 cutting through the upper slit portion of the bottom of the array fossil, remaining behind and deprived of all the supports, is deposited on the plate conveyor, forming over a free space. In settled on plate conveyor cut bottom array 5 (2) fossil immediately starts chasing inclined shear cracks. Cutting is rubbishing 17 moving along the inclined surface of the rack 20 from the top down. When moving down through the resulting from operation of the cutting bar inclined crack bromaline draws a thin metal sheet with a width of 2.8 m (full width cut array fossil). When cutting the inclined cracks the feed force is generated circular traction device 19, so that bromaline 17 consists only of cutting part and ensure its motor. After cutting the inclined cracks n the entire length of the inclined rack 20 sheet metal must cover the entire area of the cut with inclined slots, as well as the lower part of the inclined cut layer 18, which it is based on the transition section 4 of the plate conveyor. The end portion of the sheet metal has hooks on both sides of the sheet, the operator of the inclined rack engages with the left-carrying plate plate material handler 21 to cut blocks of fossil. After cutting the blocks mnogomodovoi machine 22 is included in the operation of the drive cylinder tailpiece 21, and its load-carrying plates start moving with a speed of 0.1 m/s render blocks fossil onto the discharge conveyor and simultaneously draw on becoming his material handler metal sheet with its top cut sloping layer of fossil. After retracting all inclined fossil layer 18 on becoming the loader 21 using a traction device 19 is hood using a traction device 19 of the sheet metal from under located on the loader 21 inclined layer 18 and his rise up the incline of the ramp in the free space above the cut bottom by 5 array. After these preparatory operations are included drive head plate conveyor lava 4 and is made with a speed of 0.1 m/s moving cut bottom array fossil on the length of the calculation to the new position of the bottom of the array 5 was repeated its previous position. Then again begins cutting the inclined slit through the electric machine 17 as it moves downward with the movement on the inclined slit sheet metal, and the process repeats.

Determine the length that you want to move every time bottom-hole array 5 to obtain the height of the blocks fossil height of 2.7 m Height blocks 2,7 twice their size along the length of the lava 1,35 m As inclined fossil layer 18 after it is moved on the plate loader lies horizontally, the height of cut blocks equal to the thickness of the inclined layer 18. fossil 2,7 m Therefore, to obtain the height of cut blocks 2.7 m it is necessary that the thickness of the inclined layer is also equal to 2.7 meters, Then the length that you want each time to move the bottom hole array is equal to 2.7 m:Sin α, where α is the angle of the inclined layer to the horizon. When the angle α=52º, this distance is 2.7 m:Sin 52º=2.7 m:0,79=3,4 m This length is determined by the number of inclined cracks that need to be cut when cutting the bottom hole of the array of fossil on a separate sloping layers (200 m-7 m):3.4 m=57.

Determine the length of time cutting cut the bottom hole of the array of fossil into separate blocks, ready to issuance of lava on loading. When the power developed shallow layer of 10 m and a height of the lower Podravka layer 1, m height of the cut bottom of the array is equal to 10 m-1.5 m=8,5 m When the angle of inclination to the horizon of the inclined slit 52º length of the inclined slit is equal to 8.5 m:Sin 52º=8.5 m:0,79=10,8 m At a speed of cutting an inclined slit 2,81 m/min according to the technical characteristics of bromaline duration of cutting one of the inclined slit is equal to 10.8 m:2,81 m/min=3,84 minutes At a speed of movement of the carrying plate material handler 0.1 m/s the length of time to move the inclined fossil layer 18 (Figure 2) from an inclined to a horizontal position on the plate loader is equal to (3.4 m+10,8 m):0.1 m/s=142, =2,36 min, where 3.4 m - distance move layer along an inclined transition section of the plate conveyor, 10,8 m is the length of the plate loader, which equals the length of the inclined fossil layer. Then the total time cut and move one inclined fossil layer is of 3.84 min+2,36 min=6,2 minutes Time spent on cutting the inclined cracks of 3.84 min combined with the time of cutting mnogomodovoi Pereguda machine cutting vertical transverse slots located on the plate material handler previously posted inclined fossil layer. Since the height of the inclined layer is 2.7 m, and the speed of cutting 2,81 m/min (as megobroba Pereguda machine has a cutting part and the actuator are the same as electric car "Ural-33"), the time parisani the inclined slits is equal to 3.4 m:2,81 m/min=1,2 min As 1,2 min less than that of 3.84 min, the time for cutting the vertical transverse cracks completely combined with the time of cutting of inclined shear cracks. But then for the total time of 6.2 min is completely cutting into separate blocks and issuance of lava in the history of fossil part of the cut bottom of the array 5 (2) in the amount of one inclined layer. Because just cut the bottom hole array has 57 inclined layer, the length of their cutting into separate blocks and issuance of lava on loading equal to 6.2 min·57=357 min=6 hours

Over 18 hours of working time on the fossil can be made

18 h:6 h=3 in the technological cycle of production of fossil. With one cycle of production volume equal to 200 m·2.8 m·10 m·1.3 t/cube=7250 so Then the amount of daily production when the technology in question is equal 7250 t×3=21750 tonnes.

Bibliography:

1. Progressive technological scheme of reservoir development in coal mines. IGD them. A.A. Skochinsky, A.A.. M. 1977

1. Method of underground mining of mineral deposits, thick flat-lying strata, large blocks, including the education of the lower Podravka layer plough Assembly moves in her delivery conveyor, the cutting in the bottom longitudinal array along the length of the lava back vertical and the top border with the Kyrgyz Republic shall pour cracks, lowering the array on the conveyor, cutting fossil units, the issuance of lava fossil units, their loading into cars and the locomotive hauling the camera for crushing in rossinow mass, characterized in that deposited on the conveyor array cut oblique transverse slit, splitting the array in inclined layers, which are then transferred to a horizontal position for cutting fossil units.

2. The method according to claim 1, characterized in that the cutting of the vertical transverse slits produce mnogomodovoi machine with electric drive.



 

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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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