UA13399U - Method for degassing of gas-bearing coal bed - Google Patents

Abstract

The method for degassing gas-bearing coal bed according to which along the ventilation drift one makes an insulated from the common mine ventilation system pipeline, this is connected to the source of draught for gas suction in the places of intensive gas liberation; at that gas suction is performed from the placed periodically along the ventilation drift degassing wells, those are drilled in gas-saturated ceiling of the coal bed near the cleaning face with connection to the branch pipes of the pipeline connected to the vacuum pump station.

Description

Description of the invention

A useful model applies to the mining industry and can be used in the development of gas-bearing 2 coal seams.

There is a known method of degassing a gas-bearing coal seam |(ЗО as. Mob53404, Е21Е1/00), according to which a gas drainage pipe isolated from the general mine ventilation system is carried out along the ventilation pipe, which is connected to a fan. Periodically, along the length of the ventilation stretch, insulating membranes are constructed, which, as the cleaning hole progresses, are disassembled and gas is sucked out through the gaps formed in places of intensive methane gas release.

Coinciding with the essential features of the claimed method is the provision along the ventilation stretch of a ventilation system isolated from the general mine, the source of which is suction of gas in places of intense gas release.

When using the known method, degassing of the gas-bearing coal seam is insufficient, which limits the productivity of coal production.

A known method of degassing a gas-bearing coal seam |Z a.s. Мо1312183, Е21Е5/00, 7/00), chosen as a prototype, according to which a pipeline isolated from the general mine ventilation system is laid along the ventilation stretch, which is connected to the fan on the earth's surface. The first outlet of the pipeline is located behind the line of the cleaning hole at a distance of 5-15 m and the gas is sucked from the created space. The second outlet of the pipeline is placed parallel to the line of the cleaning blowout and gas is sucked in places of intensive gas release.

Coinciding with the essential features of the claimed method is the laying of a pipeline isolated from the general mine ventilation system along the ventilation stretch. The pipeline is connected to a source of traction, which is used to suck gas in places of intense gas release.

The disadvantage of the known method is the same as that of the previous analogue.

The basis of the creation of a useful model is the task of improving the method of gas-bearing coal seam degassing, in which, by changing technological operations, the improvement of gas-bearing coal seam degassing is ensured, due to which the productivity of coal production is increased.

In the method of gas-bearing coal seam degassing, which is followed by a pipeline isolated from the general mine ventilation system along the ventilation stretch, which is connected to the traction source, which Me. gas is sucked in places of intensive gas release, according to a useful model, gas is sucked from Ge") periodically located along the ventilation stretch of degassing wells, which are drilled into the gas-saturated roof of the coal seam near the cleaning pit, connecting with the taps of the pipeline connected to the vacuum pumping station . co

In addition, the gas is sucked by a group of vacuum pumps, at least one of which is located in the underground

Prnych products. --

The combination of the above features of the proposed method provides increased degassing of the gas-bearing coal seam by means of effective vacuum suction with the creation of a high depression in the gas-saturated roof of the coal seam near the cleaning pit during cleaning operations and partially in the zone of the produced space. At the same time, the gas saturation of the roof of the coal seam is reduced and, as a result, the concentration of methane in the mine workings is reduced. At the same time, they solve the task and increase the productivity of coal production.

From" Fig. 1 shows a schematic view of the cleaning hole and the degassing system, Fig. 2 shows the degassing wells in section.

Excavation column 1 is bordered by a roll-off shaft 2, a cleaning hole C and a ventilation shaft 4, in which the air flows of the general mine ventilation system pass, marked by arrows 5. Degassing - a well or several degassing wells 6 with suction pipes are connected through connecting couplings 7 with pipeline branches, which in the figure are under couplings 7, and pipeline 8. Connecting couplings 9 of pipeline 8 are located near notches 10 in the roof 13 of coal seam 11. Arrow 12 indicates the direction of gas suction, where the vacuum pumping station is also located, which is picture not shown.

Te) 20 The proposed method is carried out as follows.

Flows 5 of the general mine ventilation system enter the roll-off line 2, the cleaning hole C and the ventilation line 4, along which a pipeline 8 isolated from the general mine ventilation system is laid, which is connected to the vacuum pumping station. Connecting couplings 9 with taps are periodically installed in the pipeline 8, which are blocked at the first stage. Near the taps in the upper part of the excavation column 1, notches 10 are made, through which degassing wells c 6 are drilled as the cleaning pit C approaches. These wells are connected through suction pipes and connecting couplings 7 to pipeline taps 8 and suck gas in places of intensive release methane, which are the roof 13 of the coal seam 11 and satellite seams 14, along the direction 12.

As an option, the gas is sucked by a group of vacuum pumps, at least one of which is placed in underground 60 mine workings, thereby increasing the power of gas suction from degassing wells 6.

The use of the proposed method reduces the concentration of methane in mines, the probability of an explosion of a methane-air mixture, increases the safety of mining operations, improves the microclimate in mines and the productivity of coal production. b5

Claims (2)

The formula of the invention 1. The method of degassing a gas-bearing coal seam, according to which a pipeline isolated from the general mine ventilation system is laid along the ventilation stretch, which is connected to a source of traction, which is used to suck gas in places of intensive gas release, which is characterized by the fact that gas is sucked from periodically located along the ventilation stretch degassing wells, which are drilled into the gas-saturated roof of the coal seam near the cleaning pit, connecting with the taps of the pipeline connected to the vacuum pumping station. 2. The method according to claim 1, which differs in that the gas is sucked by a group of vacuum pumps, when hiring one of which 70 are placed in underground mine workings. what about Ge) Ge) Ge) Ge) "- - a - (95) (95) (se) (Che) bo b5