Method of coal extraction by sublevel hydraulic winning with concurrent methane extraction

FIELD: mining.

SUBSTANCE: method includes coal bed extraction in sub-levels with the use of hydraulic mining and pressure tight bulkheads. First, sublevel drifts are put to the boarder of mine section, then, as far as the coal is extracted in the sublevel entry way there installed is portable pressure tight bulkhead with pipe and duct for the output of coal slurry and concurrent methane exhaustion from near-well bore area. Note that after sublevel working out methane exhaustion is continued from the ducts installed in pressure tight bulkheads.

EFFECT: complex and rational use of coal in subsurface resources ensured by concurrent methane extraction, reduction of coal prime cost, safe mining.

4 dwg

 

The invention relates to the mining industry and can be used in the development of minerals.

Known sublevel getrootpane with flexible overlay mounted in the same plane for the development of steep seams 8 m (Krackow A.P. Technology of mining. - M.: Nedra, 1985, s-296).

The disadvantages of the technology are: the need to spend a large amount of preparatory workings; dangerous working conditions because of the large volumes of methane emissions.

These disadvantages are partially resolved in another way (Technological scheme of development of coal seams Prokopyevsk-kisilevsky field systems sublevel getrootpane (GIP), instruction on safe use of technological schemes of development of coal seams Prokopyevsk-kisilevsky field systems sublevel getrootpane (GIP), Aksenov GI, Afanas'ev, I.V., Vorozhtsov SV and other Prokopyevsk, 2006, p.45-52).

Cleaning seizure in the substage is performed by jetting. Ventilated longwall face and preparatory development using local fans airing. For safety use safety shield. After testing the camera (Zachodni) and fill the breed becoming high-pressure, vent pipe, transport chute for the passage of pulp Karachev who are, the giant and the flap is transferred to a distance of 6-8 m and then the cycle of dredging coal repeated.

Also known another method (patent RF №2368783 to the invention. "The way to develop coal seam borehole gidrodobychnyh", Appl. 30.04.08 year). In this way in a pre-drilled hole set cylindrical portion of the sealed chamber. Then she put the water hose on the hydraulic ejector and issuance of the coal slurry to the surface, after which the cylindrical portion of the sealed chamber attached sealed chamber with a nozzle through which air is sucked methane consumers when mining a coal seam.

Along with the existing advantages of this method has drawbacks:

- a large amount of preparatory work;

- low quality of coal mined;

- large cost of coal.

The objective of the invention is to eliminate the above disadvantages of the prototype, and thus the creation of this method of coal extraction, which allows to carry out:

complex and rational use of coal resources by passing methane production;

- reducing the cost of coal.

- the safe development of minerals.

The invention consists in that in the method of coal extraction sublevel gidrootbojkoj with associated methane production, including mining HS is a high layer in potatah using hydropobic and tight jumper, first held sublevel drifts to the border of the extraction field, then, as the extraction of coal in the benches of the substage install portable sealed jumper pipe and nozzle for issuing from the bottom zone of the coal slurry and associated pumping methane, and after a failover substage pumping of methane proceeds from the nozzles installed in the capital airtight jumpers.

The method is illustrated in the drawings, in which figure 1 is a diagram of the testing reservoir sublevel gidrootbojkoj associated with methane extraction; figure 2 - section a-a in figure 1; figure 3 is a cross-section B-B in figure 1; figure 4 - section b-b In figure 2; I, II, III stages of coal extraction in the section.

The method of coal extraction sublevel gidrootbojkoj with associated methane production is carried out as follows.

On ventilation and haulage horizons of the reservoir is opened crosscut 1, 2, are scat 3, and vent 4 and pulposus 5 of the furnace. To the border of the extraction field are sublevel drifts 6, 7. On the border of the extraction field at a distance equal to the length of zagadki are giant 8 and portable sealed jumper 9 box 10 of Plexiglas to monitor the operation of the monitor 8 and the pipe 11 to transport slurry to pulpeuse furnace 5. Is split furnace 12 and begin treatment works backward from sublevel drift in tataje 13 benches 14 along the strike of the formation. After excavation of coal in the section 14 portable sealed jumper 9 is transferred to the extraction of coal in the new section, reduced pipe designed to transport slurry 11 and rods vent pipe 15 and pipe 16 for supplying water to the water cleaning unit 8. Repulsed high-pressure water jet coal with water falls onto the receiving tray 17 and then the pulp together with the methane in the pipe 11, is laid on the sublevel drift 6, is transported to pulpeuse furnace 5. There on the pair of notches 18 and sublevel drift 6 through the pipe 19 methane rises to the vent horizon 20 and the slurry through pipes laid in pulpeuse furnace 6, enters the haulage horizon 21.

After a failover substage 13 in the grooves 14 are installed capital tight jumper 22, 23 with the pipes for the removal of methane from the goaf. Fresh air for ventilation of preparatory development 7 and sublevel drift 6 flows through the pipes 24 from local ventilation fan 25 mounted on the main horizon 21 and then through the pipe 15 to the crosspiece 9. Outgoing stream of air from mines 6, 7 and furnaces 4, 5 and skate 3 comes out on vent horizon 20.

The method of coal extraction sublevel gidrootbojkoj with associated methane production, including the development of a coal seam in potatah with use the of hydropobic and tight jumper, wherein the first conducting sublevel drifts to the border of the extraction field, then, as the extraction of coal in the benches of the substage install portable sealed jumper pipe and nozzle for issuing from the bottom zone of the coal slurry and associated pumping methane, and after a failover substage pumping methane continue from nozzles installed in the capital airtight jumpers.



 

Same patents:

FIELD: mining.

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FIELD: mining.

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FIELD: mining.

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FIELD: mining.

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17 cl, 6 ex, 2 tbl, 7 dwg

FIELD: mining.

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FIELD: mining.

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FIELD: mining.

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FIELD: mining.

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4 dwg

FIELD: mining.

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2 dwg

Water jet nozzle // 2374448

FIELD: mining.

SUBSTANCE: invention is related to treatment of item surfaces with water jet. Water jet nozzle comprises body with the first nozzle head arranged on its front end, besides axis of outlet hole in the first nozzle head in plane of front end of body has an angle of inclination to axis of body rotation and is displaced relative to axis of rotation, and the second nozzle head, arranged on body side surface, besides axis of outlet hole of the second nozzle head is inclined to axis of body rotation to the side of its front end. Body comprises device for flow interruption, which comprises disk made in the form of sleeve, bottom and side walls of which have slots in the form of sectors and small turbine that represents impeller made of hub and blade crown, for instance with four blades arranged at an angle to nozzle axis. Disk and small turbine are fixed on axis, which it in turn is installed in sliding bearings, one of which is fixed in nozzle body from the side of front end, the other one - in central part of support, having shape of ring with ribs of rigidity, with external radius equal to radius of bore, where it is installed. Support is fixed with threaded ring.

EFFECT: improved efficiency of water jet nozzle due to dynamic action of pulsating water jets at material.

4 dwg

FIELD: mining.

SUBSTANCE: invention relates to mining and can be used at development of stratum of coal by means of water-jet boring-and-reaming with following delivering of methane to consumer. Development method of stratum of coal by water-jet boring-and-reaming includes treatment of stratum with usage of predrilled well, hydraulic monitor with jet and jet elevator. Into predrilled well it is installed parallel portion of hermetic chamber, then into it is inserted pipes for water feeding to jet elevator, hydraulic monitor, and delivery of coal slurry to surface, after what on parallel portion of hermetic chamber it is fixed hermetic chamber with branch, through which it is exhausted methane by consumer at treatment of stratum of coal.

EFFECT: it provides implementation of unattended mining of minerals, and also - simultaneous delivery from one well of minerals and methane.

1 dwg

FIELD: mining.

SUBSTANCE: invention refers to mining industry, and namely to development method of steep coal bed. Method involves development of coal bed by using pre-bored wells and a hydraulic monitor with a head piece. First, cross drift is made from the slope in the direction of the superface or soil of the bed, then in the cross drift there installed is a boring machine for boring inclined wells of large and small diametre at one and the same level through certain length; after that in the well of small diametre there installed is bore-hole hydraulic monitor with the head piece rotating at 180°, and coal breakage is begun at the sub-level; at that, the well of large diametre, which is broken as the sub-level development proceeds, is used for transporting the broken mined rock to the slope.

EFFECT: complex and rational use of subsurface resources, manless mining operations, reducing costs for the bed preparation and increasing labour efficiency.

5 dwg

FIELD: mining engineering.

SUBSTANCE: invention relates to field of hydraulic boring-and-reaming of minerals, particularly to structures of gears for hydraulic boring-and-reaming solid minerals. Device consists of connected to each other tubal line with introduction and low end wall. Low end wall contains side water jet nozzle, pulp-receiving windows and jet elevator device. Diffusion cell jet elevator device by means of outlet is hydraulically connected to space between casing column and tubal line, and in bottom-most portion of low end wall it is installed butt water jet nozzle, hydraulically connected to separating cavity. Length of low end wall is more than distance between casing shoe and subface of producing stratum. Top part of casing pipe is outfitted by exterior reference ring and air-feeding pipe, rigidly fixed to casing pipe, and in bottom part of casing pipe there are implemented openings for feeding of compressed air into stope. Between casing pipe and body of low end wall, higher openings for feeding of compressed air, it is installed ring gasket.

EFFECT: it provides effectiveness increase of HBR ensured by creation of physical environment of side water jet device in unsubmerged space of stope.

1 dwg

FIELD: mining industry.

SUBSTANCE: method includes opening productive bed by product slanting well, casing the well by pipes column, mounting well block with concentrically positioned pipes columns, lift and hydro-monitoring headpiece, hydro-monitoring erosion of bed and raising formed mixture of rocks by said lift to surface. According to method, opening of productive bed is performed using product slanting well and its casing is performed by displacing outer pipes column of well block along well axis and concurrent rotation of inner pipes column, hydro-monitoring headpiece is inserted inside outer column of pipes of well block, and during erosion of bed it is pulled out of outer pipes column of well block. Device for realization of said method is made in form of well block, including as common parts concentrically placed pipes column, outermost of which is casing column of well, and inner one is provided with headpiece with lift, hydro-monitoring headpiece and pressurizing element, and portal in form of two-passage swivel for feeding water and draining pulp. Pressurizing element is mounted at end piece above hydro-monitoring headpiece and is made in form of cylindrical shelf. To limit movement of inner pipes column relatively to outer pipes column, at lower end of outer pipes column a bushing is mounted with possible interaction with cylindrical shelf, outer diameter of which exceeds inner diameter of bushing.

EFFECT: higher efficiency, lower costs, lower laboriousness.

2 cl, 4 dwg

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