SU1373817A1 - Method of mining a suit of thin gas-bearing steep coal seams - Google Patents

Abstract

The invention relates to mining and m. used for deserted development of coal seams with associated gas production. The purpose of the invention is to increase the efficiency of reservoir development by increasing the reliability of coal blasting and transporting processes, as well as isolating and maintaining the bottom hole with the help of pressure. Along the strike of the formations, the retractable 1 and the vent 2 group drifts (III) are conducted. On the side of I I and 2 on the haulage and ventilation horizons, the formations of the formations are opened with double cut-points (K) 3,4. From the K 3 pair, along the strike of the seams, a well is drilled 5.6 to intersect them with napoii K. Pair K 4 with a split furnace 7 are connected and an excavation mechanism 8 on traction cables 9 connected with winches 10 is placed in it. Jumpers 11,12 isolate K 3 from the exhausted space (VP) 13. A clearing excavation is carried out on each horizon mechanism 8 pillars along the strike with the management of the roof collapse of lateral rocks. At the same time, the recess in VP 13 is hydrotubeled at a constant gas pump filling with the water 13 and the formation of a hydrogas-coal mixture. As the clearing intake from the furnace 7 is advanced from Ш 2, wells 14 are drilled and through them in VP 13, elastic shells 15 are lowered parallel to the clearing inlet line and filled with aggregate. Through the well 14, the space between the rows of shells 15 is filled with hardening material, forming insulating strips 16. At the same time, the strips 16 are erected at intervals equal to the step of the side rockslining. The release of the mixture from the space 16 isolated by the strips 16 is made through the wells 18 connected to Ø 1. 3 з. item f-ly, 1 ill. i (L oo oo 00

Description

The invention relates to mining and can be used for the deserted development of steep gas-bearing coal seams with associated gas production.

The aim of the invention is to increase the efficiency of reservoir development by increasing the reliability of coal blasting and transportation processes, as well as isolating and maintaining the bottom-hole space with the help of water pressure.

The drawing shows a diagram of the preparation and development of the reservoir with a constant flooding of the developed space.

The method is as follows.

Along the strike of the formations, the retractable, 1 and ventilating 2 group drifts are conducted. From the side of drifts on the haulage and valve by the dione horizons, the formations are opened by pair pitches 3 and 4. Out of the main pair of queers 3, along the strike of the beds, the well 5 on the fan horizon, well 6, before crossing them from an additional pair of crosscups 4. Along the line of rebellion, the twin pitchers 4 are interconnected by a split furnace 7, in which a notch mechanism 8 is placed on the hauling ropes 9. The branches of the hauling ropes are passed through the wells, and their ends are connected from one side to excavated by mechanism on the other hand, with traction bodies 10 (winches). The latter can be both two and one. In the wells, jumpers 11 and 12 are installed and isolate the space generated by them 13 from the opening crosscuts 3.

The removal mechanism is controlled from the cross-section through traction organs. Clearing the excavation is carried out with closed bridges in unventilated gassed space without the presence of people in the face using

hydrotreatment with constant ZAPOL

The development of the mined-out space with a hydrogazonal mixture, which is formed during coal blasting and water supply into the mined-out space.

During the departure from the split furnace, a borehole 14 is drilled from the group drift 2 of the ventilation layer, which is connected to the developed space.

Through two lateral wells 14, bends of long elastic shells 15 are lowered into the worked-out space. They are lowered with a cable with a load on its end, while for the sake of compactness the packages are folded along the length, which freely pass through the wells. Shells in the developed space are placed along the bottom, filled with a filler, for example compressed air, to a pressure exceeding that of the hydro carbonic mixture in the developed space. Thereafter, a hardening material is injected into the central well 14, which enters the space between the rows of shells, displaces the mixture from it and hardens, forming an insulating strip 16. To release the mixture from the insulated space 17, it is connected by additional wells 18 to the group drift 1 haul horizon. The discharge of the gas-coal mixture from the bottomhole space is carried out at the moment of coal hydrotreatment through wells 5 and 6 both to the haulage and vent levels, while maintaining the necessary pressure in the enclosed bottomhole space. The mixture is transported to the table at the expense of overpressure in the bottom-hole space enclosed by a strip 16. The gas from the mixture is separated outside the excavation site in order to facilitate the transport of coal. The separation of coal from water is carried out on the surface by dispensing the mixture from the mine. Insulating strips are erected at intervals equal to the caving step for better control of the displacement processes. At each successive such advance interval, the cycle of work is repeated. After the material hardens into the space between the rows of shells, the latter are lifted through the boreholes 14 into the group drift of the ventilation horizon, having preliminarily released air from the shells until the surface of the sheath is folded into a package.

Claims (4)

1. The way to develop a retinue of thin gas-bearing steep coal seams. including the group drifts of the ventilation and haulage horizons, the opening of the suite at the lower and upper boundaries of each layer is go- kizonshlyazi with the location of the traction bodies in the shafts, coal seam cleaning in the clearing holes through the wells at each horizon using the JQ plowing mechanism along the roof management with the collapse of lateral rocks, drilling wells from group drifts into the developed space, isolating the developed space from opening - torsion marks, characterized in that, in order to increase the efficiency of reservoir development by increasing the reliability of coal blasting and transportation processes, and 20 Owing to the pressure of the water, the cleaning cavity is led into the developed space, which is filled with water and form a hydrogen-carbon-black mixture, while As the fire moves, the split furnace from the distance equal to the breakdown step lateral rocks in the developed space, parallel to the line of cleaning An insulating strip of hardening material is erected into the hydrogas-coal mixture, and then the hydro-coal mixture is discharged from the latter through additional wells to the group haulage roadway. 2. Method POP1, characterized in that the insulating strips are made by installing elastic shells along the intake side, which are lowered into the developed space through wells drilled from the group drift of the ventilation layer hardening material. 3. The method according to claims 1 and 2, which is based on the fact that the developed space is released when the hydro-gas mixture is released and filled with filling material. 4. A method according to claims 1 and 2, characterized in that the developed space released upon release of the hydro-carbon mixture is filled with water.