Method of remote coal extraction at edge seams in open-cast and device to this end

FIELD: mining.

SUBSTANCE: this process comprises open coal extraction by cut chambers, production of barrier posts and backfilling of said chambers. Drilling hardware represents a milling driller located on day surface with drilling tool inclination of 45-90 degrees from vertical line. Note here that coal removal from blocks is performed with the help of hydraulic drawing device at liquid-to-solid ratio equal to 1:3. There, coal pulp is directed to coal dewatering to 7-8 % while effluents are forced to desliming and circulation.

EFFECT: higher efficiency and safety of edge seams development.

6 cl, 3 dwg

 

The claimed group of inventions relates to mining and can be used in the development of coal deposits on the layers of the abrupt occurrence of an outdoor way, mainly in the coal fields, which are at the final stage of the open development and already spent career fields.

The known method snegoborbe the development of thin seams of coal deposits by drilling-out of coal snegoborbe dishwasher, with an open surface, and its granting are using a dragline (see U.S. patent No. 4589700, IPC CL. ES 41/31, AS 47/00, AS 41/26 from 20.05.1986 G.).

The disadvantages of this method is low productivity, significant losses of minerals, of limited use for the development of coal deposits, as well as the opportunity to use this method only as a subsidiary process.

Also known a method of extraction of mineral reserves with the help of developers with thin seams sectional conveyor installation and multi screw conveyor (see patent WO 95/02746, IPC. CL. IS 41/28 dated 12 July 2004).

The disadvantage of this method is that it has limited scope, as it involves the mining of the mineral only after reaching the open cast mining of the limiting factor sun�Shi and only low-power, single, horizontal or flat seams.

Also known a method and apparatus construction in the soil insulation of walls by tunnelling gap milling and recesses developed soil material from the cracks on the ground surface, fill the resulting gap reference suspension for supporting and maintaining the gap, the filing of the solidifying suspension, which displaces the supporting suspension (see FRG patent No. 19530827 C2, IPC, CL E02D 5/18 from 22.09.1995).

The disadvantage of this method and device is highly specialized focus, providing only the construction of earthworks, namely the construction of soil insulation of walls, as well as the lack of technological parameters and modes for the application of this method and device technologies for the development of steeply dipping coal seams, which prevents cost-effectively and safely apply them for coal mining on steep seams of occurrence in open cast mining.

Closest to the claimed invention is a method of mining from the pit, trenches or other excavations by opencast mining and extraction of minerals mining and cameras, leaving between them a safety pillars and the subsequent laying of the cameras that are implemented with the use�m complex open-underground mining (see RF patent №2247241, IPC CL. ES 41/00 on 20.06.2003).

The disadvantage of this method is that it does not provide the possibility of mining steep seams, and also requires the preservation of the considerable size of the safety pillars between excavation chambers formed by open-underground mining, which leads to loss of the mineral or the need to shift from an open and open-underground mining of seams, carried out with complex open-underground mining, the extraction of minerals by underground mining. This significantly reduces the economic efficiency of field development.

Closest to the claimed invention is a device and method for the construction of soil insulation of walls, which includes a frame, one or more on the frame below the lower disk cutters, one or more additional disk mills, located on top of the frame made mirror-symmetrical relative to a plane passing perpendicular to the feed direction, the dispensing of the fluid intended to flow into the gap of the bonding liquid (see patent RU 2304197 C2, IPC, CL E02D 5/20, E02F 5/08 dated 08.08.2005).

The disadvantage of this device and method is that they are intended for use at about�covered the mining of steeply dipping coal seams by the extraction of coal at the surface, as used in the construction, namely the creation of engineering structures - walls". In addition, this device and method are characterized by low productivity, lack of special equipment for drilling-out of coal mining and cameras, to a depth of 100 m and more, as well as his raise on the surface and warehousing, all of which disadvantages does not allow an economically and technically effective to make the open mining of coal deposits.

The technical result of the invention is to improve the efficiency and safety of mining of steeply dipping coal seams through the use of remote coal mining in open-pit mining and milling and drilling tools with hidrolygica coal, as well as the application of technological schemes for coal dewatering and recycling of process water in water reuse.

The invention consists in that in the method of remote coal mining on steep seams of occurrence in surface mining, including open development and dredging of coal mining and cameras, creating a barrier pillars, the Foundation excavation of the chambers as a drilling device, used milling drilling machine, placed on the surface, with a goal�VKE coal seam angle milling drilling tool from 45 to 90° from the vertical, the coal extraction from coal-mining cameras are using the device gidrofiziki coal at a ratio of solid and liquid phases is equal to 1:3, after which the coal slurry is fed to the dewatering of coal up to 7-8%, and waste water for desliming and turnover.

The method also lies in the fact that coal extraction from coal-mining unit is made by drilling excavation cameras size 1.2 x 2.2-3.5 m down dip of the stratum, at a depth of 100 m and more.

In addition, the way to harden the barrier pillar is the creation of injection slits by contour penetration cracks milling with a size of 0.2×1.5 m, with coal extraction, injection and filling of cracks with a hardening composition, for example a composite mixture in the form of coal sludge, resulting from the clarification of sewage, water, Portland cement grade 300, overburden, with the ratio equal 3:2:1,2:5.

Drilling device remote coal mining on steep seams of occurrence in open cast mining, containing milling/mixing mill made mirror-symmetrical relative to a plane passing perpendicular to the feed direction, and rotating in opposite directions or in one direction, the dispensing of fluid, a rotation drive, a telescopic drill rod, is further provided with a Ustra�STW gidrofiziki coal on the surface, consisting of a conveyor Elevator-bucket for hoisting coal, and a chamber for collection of coal pulp, put over a milling/mixing mills, made in the form of two adjacent drum cutters.

While on the surface of the milling drum provides the lining with the attached single milling milling teeth and ribbons, made of wear-resistant material.

In addition, the device of gidrofiziki of coal may be made in the form of a pump installed in the base of the excavation chamber, connected with reinforced slurry pipeline for collection and recovery of coal slurry on the surface.

In contrast to the known proposed method allows to increase the efficiency of coal mining on steep seams of occurrence in open cast mining and environmental safety of mining operations through the use of milling drilling machine in combination with the technology of coal dewatering and the use of waste process water for recycling water supply of this technology.

This result is achieved by Stripping the coal seam or seams on stretch open cast mining and the installation of strata milling drilling machine that allows for drilling coal excavation cameras size 1.2 x 2.2-3.5 m, at an angle of 45 to 90° from the vertical, relative�Uo axis stretch of the reservoir, and to a depth of 100 m and more.

With the aim of increasing productivity and continuity of the technological process of coal extraction from coal-mining chambers on the day surface, lead to the use of the device of gidrofiziki coal at a ratio of solid and liquid phases T:W=1:3, after which the coal slurry is fed to the dewatering of coal up to 7-8%, and waste water removal, and then recycled back into the process.

In addition, to improve the durability and performance milling drilling tool on the surface of the milling drum mounted liner, which is fixed to a single milling milling teeth and tape, made of wear-resistant material.

Also to enhance the security of surface mining carries out pre-hardening of the walls of the excavation chamber along its perimeter. This is achieved by maintaining barrier pillar width of 1.0 m and the creation of the injection slit milling with a size of 0.2×1.5 m with excavation of coal injecting and filling the cracks with a hardening composition. For example, the composite mixture in the form of coal sludge, resulting from the clarification of sewage, water, Portland cement grade 300, overburden, with the ratio equal 3:2:1,2:5.

Thus the above method and device for its implementation allow�Ute significantly increase the efficiency of coal production and reduce economic costs for the production and reclamation, followed by open and underground mining of coal deposits, and to increase safety in mining coal and protecting the environment. This is achieved through the use of remote method of mining coal in open cast mining and milling drilling rig with hidrolygica coal on the surface, as well as technological activities, such as dewatering and desliming coal wastewater for water recycling.

Fig.1 shows a diagram of the technology of remote coal mining on steep seams of occurrence in surface mining: (a) top view, b) cross section a-A; Fig.2 - diagram of the device for the implementation of the proposed method: (a) side view, b) cross section B-B; Fig.3 is a schematic flow diagram of remote coal mining for the implementation of the proposed method.

Technology of remote coal mining on steep seams of occurrence in surface mining includes open pit edges 1, coal bed 2, an extraction chamber 3, barrier pillar 4, the injection slit 5, the spent extraction chamber 6, the filling material 7, winning crack 8, pump station 9, the drying device 10, the conveyor belt 11, a storage facility for coal 12, the slum 13, milling drilling machine 14, milling drilling tool 15, electrop�water 16, milling drums 17, the device for supplying water 18, reinforced hose 19, the device gidrofiziki coal 20, a chamber for intake of coal pulp 21, conveyor Elevator-bucket 22, the wheel with the toothed rims 23, the lining 24, single milling teeth 25, the milling of the ribbon 26, disc cutters 27, drive pulley 28, the transmission circuit 29, the rod 30, the crane suspension 31, crane rope 32, the additional conveyor section Elevator-buckets 33, the receiving hopper 34.

Method of remote coal mining on steep seams of occurrence in open cast mining is carried out as follows. Open cast mining pre-Stripping of the coal seam 2 along strike, which is a horizontal flat area. Then on a lined pad set milling drilling machine 14, which is developing coal seam 2 consecutive drilling production chambers 8 size 1.2 x 2.2-3.5 m at an angle of 45 to 90° from the vertical, relative to the axis of stretch of the coal seam (a) 2, and a depth of 100 m and more. To increase the depth of the development of a mining chamber 8 are used the additional section of the conveyor Elevator-bucket 33.

For drilling-out of coal milling drilling tool 15, consisting of the actuator 16 is used to rotate the milling drum 17, and device gidrofiziki coal 2, device for supplying water 18, reinforced hydrochloro 19, device gidrofiziki coal 20, consisting of a chamber for collection of coal pulp 21 and conveyor Elevator-bucket 22, under the action of the two milling drum 17 rotating in opposite directions, is buried in the coal seam 2. Moreover, a milling drum 17 rotating in the direction to the device for supplying water 18. The process of drilling-out of coal is produced by disc cutter guides 27 mounted on the ends of the milling drum 17, is covered with a lining 24 with single milling teeth 25 and milling belt teeth 26, is made of wear-resistant material.

Thus for the formation of coal slurry through a device for supplying water 18, which includes reinforced hose 19, the space between two milling drums 17 enters the water, which, forming a coal slurry, fills the chamber for collection of coal pulp 21. Then the coal slurry at a ratio of solid and liquid phases T:W=1:3 from the chamber for collection of coal pulp 21 by means of conveyor Elevator-bucket 22 rises to the surface, where it emptied into the receiving hopper 34. Next, the coal slurry enters the dewatering device 10 with receipt of oversize and undersize products. Oversize product moisture content of 7-8% are supplied to the conveyor belt 11 and razgruzitsya storage facility for coal 12. Undersize product in the form of wastewater containing slimy particles, enters the slurry tank 13, where the result of natural deposition, and then processing the clarified water surfactants there is waste water. The clarified process water from the slurry tank 13 by the pump station 9 are sent to the process, and the accumulated sludge after dehydration in spectual.

To increase the security of reference of the remote coal mining on steep seams of occurrence in open cast mining between mining blocks creates a barrier pillar 4 width 1.0 m, barrier and performs a safety function, which is pre-hardened before the mining chamber 3. Hardening of the walls of an excavation unit 3 around the perimeter is achieved by creating the injection slit 5 in the sinking milling drilling tool 15 with a size of 0.2-1.5 m, with coal extraction and filling of the injection slits of the reinforcing composition. For example, the composite mixture in the form of coal sludge, resulting from the clarification of sewage, water, Portland cement grade 300, overburden, with the ratio equal 3:2:1,2:5.

As a result of the use of barrier pillar 4 excludes the ingress of backfill material 7, such as overburden, to accommodate�about waste excavation block 6, in the space of reference mining, and also prevents the collapse of the rocks hanging and lying sides of the goaf.

Thus, the above method of remote coal mining on steep seams of occurrence in open cast mining and the device for its implementation allow to increase considerably the efficiency of coal mining, to reduce economic costs for works and reclamation, and to improve the safety and environmental protection.

1. Method of remote coal mining on steep seams of occurrence in surface mining, including open development and dredging of coal mining and cameras, creating a barrier pillars, the Foundation excavation of the chambers, characterized in that the drilling device used milling drilling machine, placed on the surface, angle milling drilling tool from 45 to 90° from vertical, with the excavation of coal from a coal-mining blocks are a device of gidrofiziki coal at a ratio of solid and liquid phases is equal to 1:3, after which the coal slurry is fed to the dewatering of coal up to 7-8%, and waste water - for desliming and turnover.

2. A method according to claim 1, characterized in that coal extraction from coal mining block is a sequence of Weberian�m excavation cameras size 1.2 x 2.2-3.5 m, by down-dip to a depth of 100 m and more.

3. A method according to claim 1, characterized in that the establishment of the injecting of cracks is carried out by contour penetration cracks milling with a size of 0.2×1.5 m, with coal extraction, injection and filling of cracks with a hardening composition, for example a composite mixture in the form of coal sludge, resulting from the clarification of sewage, water, Portland cement grade 300, overburden, with the ratio equal 3:2:1,2:5.

4. Device for the extraction of coal containing milling/mixing mill made mirror-symmetrical relative to a plane passing perpendicular to the feed direction, and rotating in opposite directions or in one direction, the device for fluid supply, a rotation drive, a telescopic drill rod, characterized in that it further provided with a device for gidrofiziki coal on the surface, consisting of a conveyor Elevator-bucket for hoisting coal, and a chamber for collection of coal pulp, put over a milling/mixing mills, made in the form of two adjacent drum cutters.

5. The device according to claim 4, characterized in that on the surface of the milling drum provides the lining with the attached single milling milling teeth and ribbons, made of wear-resistant material.

6. The device according to claim 4, characterized in that the device gidrofiziki coal is made in the form of a pump installed in the base of the excavation chamber, connected with reinforced slurry pipeline for collection and recovery of coal slurry on the surface.



 

Same patents:

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FIELD: mining.

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2 cl, 6 dwg

FIELD: mechanical engineering.

SUBSTANCE: invention relates to mechanical engineering field and provided for trenching in melted soil of the I-IV category, and also in frozen grounds for engineering services, oil- and gas pipelines, drainage and can be used at contouring of foundation pis, taking out and at other works. Excavator trench rotor-type includes drive, rotor, control assembly 2 and moving mechanism. Rotor is implemented in the form of drum with tooth 14. Additionally in rotor drum it is fixed disk 6 for rotation to it transmission by means of steering circle 7, connected to rotation drive of rotor. Moving mechanism is implemented in the form of propulsive agent 8, including connected to steering circle 7 platform and three single-type double-sided hydraulic actuators, each of which contains fixed on platform casing 9 and piston 11 with rod 10, at both butts of which there are fixed hydraulic rams 12 with bearing thorned platforms 13. And drive includes pump-adjusting gear, connected by pipelines with tank 5 for working fluid and mentioned above hydraulic units. Additionally control assembly is located on platform or flooring 4 and allows manhole for entry into control assembly.

EFFECT: downsizing and productivity improvement.

3 dwg

FIELD: mining.

SUBSTANCE: facility for milling and/or drilling rock or similar materials consists of spindle drum assembled on support and intended to rotate around axis; several rotating cutter spindles are installed in drum eccentric to axis of drum. On their ends projecting out of the spindle drum the cutter spindles bear working tools. At least two of cutter spindles are actuated from a common reducing drive, which has driven tooth gears stationary arranged on the cutter spindles and a common drive element interacting with driven tooth gears. Also the drive element and the spindle drum are assembled so as to provide their rotation relative to each other.

EFFECT: processing hard materials at high efficiency of milling, increased operation life of tools, high operational reliability and compactness.

55 cl, 22 dwg

FIELD: mining.

SUBSTANCE: invention refers to mining, particularly to facilities for excavation and transfer of rock mass and can be implemented for strip mining of minerals without their preliminary opening from deposits of horizontal or flat pitch. The working body of a quarry excavator includes at least one rotor with buckets equipped with static teeth secured on a working edge of the bucket and with impact teeth connected with impact devices which are assembled on the front wall of the bucket. The rotor is equipped with reflecting lips hinged on its rim and designed to turn by means of levers during bucket unloading; also one end of the lever is jointed to the reflecting lip, while the other is equipped with a roller traveling in guides made in form of an oval wheel rigidly fixed on a rotor shaft.

EFFECT: upgraded efficiency of excavator operation.

2 cl, 2 dwg

FIELD: open-cast mining.

SUBSTANCE: invention relates to continuous-operation self-propelled device designed for checking possibility of mining mineral materials and taking out interlayers whose properties, from point of view of their breaking and further transportation, are of vital importance at open cast mining. Proposed device has running gear, frame with drive unit and control panel and cutting drum arranged before running gear and equipped with cutting tools. Said drum is installed in supports of carrying frame for rotation around horizontal axis and is made for adjusting position in height by means of cylinder installed between frames and carrying frame. Crawler-type running gear is used. Cutting drum passes over entire width of device, and it is furnished with guide partitions and guard shield, is functionally connected with chute-like housing and is made for stepless change of speed of rotation, speed of feed and adjusting transverse tilting from one of two sides relative to working platform owing to vertical adjustment of position of one of hinge joints connection device frame and carrying frame which is made in form of forked rotary cantilever.

EFFECT: improved operating capabilities of device.

5 cl, 5 dwg

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