SU1283424A1 - Method of controlling gas emission - Google Patents

Abstract

The invention relates to the mining industry and allows improving the efficiency of the method by reducing the amount of preparatory work and increasing the efficiency of controlling the supply of the air from the air 12 and dispensing the gas-air mixture 4 from the exhausted space. The outfield fields of each highly gas-bearing contiguous reservoir (SP) 1, 2, and 3 are repaired by long columns along the strike in descending order by the besselikovoy technology. The development of each of the joint ventures 1, 2 and 3 begin with the first pillar. A drainage drift (LH) 6 is conducted along the underlying SP 3 of the group SP 1, 2 and 3, which is being prepared for development. Drainage crosscuts (K) 7 or wells of large diameter connections 12 (L 1 00 with "k. X 4

Description

They are equipped with an LH 6 with ventilating LH 8 of the first pillars of the overlying SP 1 and 2. The mats of LH 8 of each of the first pillars and K 7 are reinforced with the brackets 10 during the mining of the poles. Each K 7 is equipped with an airtight bridge 11 with adjustable windows. Through the windows, the mixture 4 is withdrawn from the worked-out space through LH 6 to the air exhausting outlet 5. At the mouth of the outlet 5, a suction fan is installed. At the beginning of LH 6 equip the lock chamber 13 with

adjustable windows. Chamber 13 provides the necessary amount of air 12 to dilute mixture 4 to acceptable standards. As the clearing of the 15 working pillars progresses, a K 7 window is opened, located at the shortest distance from the 15 borehole, and the far K 7 window is closed. The number of open windows is left unchanged. Mixture 4, after being diluted with air 12, is directed to a generally occurring shaft of the shaft. 1 hp f-ly. 4 il.

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The invention relates to the onshore industry and can be used in the development of high gas-bearing contiguous coal seams with long pillars along a strike in a downward order.

The purpose of the invention is to increase the efficiency of the method by reducing the amount of preparatory work and improving the efficiency of gas control by adjusting the supply of the fresh air and dispensing the methane-air mixture from the spent space.

FIG. 1 shows the implementation of the proposed method.:; in fig. 2 shows a scheme for controlling gas emission from a goaf while mining the upper stratum; in fig. 3 - the same, the second layer; in fig. 4 - the same, the third lower layer of this group of contiguous layers.

According to the proposed gas emission control method, which includes working out high gas bearing layers, for example, 1, 2 and 3 long columns along a downward stretch and dredging according to the de-ducting technology with exhaust gas-air mixture 4 through the developed space of the previously used columns to the air vent, 5, drainage pin 6 is guided along the underlying formation 3 of the group of adjacent formations 1, 2 and 3 that are being developed, and are connected

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it with the help of drainage cross-sections 7 or large-diameter wells with ventilation drifts 8 and 9 of each first column of overlying layers 1 and 2. At the same time, in order to avoid clogging of joints of ventilation drifts 8 and 9 of the first column with drainage cross-sections 7 these workings during working off the first pillars is strengthened with additional lining, for example, with the help of fires or organ lining 10.

Drainage boards 7 equip airtight jumpers

11 with adjustable windows intended for removal of the gas-air mixture 4 from the worked-out space to the drainage drift 6. Then, using the air extraction pipe 5, the gas-air mixture is ejected directly onto the day surface or, after diluting it with air 12, to the established standards, they are directed into the initial discharge of the shaft.

Drainage drift 6 from the side of the entering air

12 equipped with a lock chamber 13, which ensures the passage of the required amount of air 12 for dilution of the gas-air mixture 4 coming from the developed space

in the drainage drift 6 to acceptable standards. Drainage development is carried out simultaneously with the preparation of the first column of the upper reservoir.

Extraction floors of each layer are worked by long pillars of

a downward trend in purposeless technology. The development of the reserves of each layer begin with the first pillar. Between the ventilation drift 8 of the first column of the upper layer 1 and the drainage drift 6 extended along the underlying formation 3, drainage tips 7 or a large diameter well (not less than 200 mm) are drilled. The distance between the cross-sections 7 takes no more than 150 m. Experimentally, as the clearing of the third and fourth digging pillars moves, gas is actively moving to the space behind the bottom of the active lava (due to air leaks) no more than 200-250 m.

Air 12 for diluting the permissible norms of the gas-air mixture 4 coming from the worked-out space to the drainage drift 6 is supplied, and discharging it into the general outgoing jet of the shaft or directly onto the day surface is carried out separately, i.e. through workings that are not associated with workings that supply fresh air 14 for airing the cleaning hole 15.

In drainage boards 7, insulating jumpers 11 are installed with adjustable windows that are kept in a closed state, except for those that are at the shortest distance from the clearing hole 15. The number of open drainage cross-sections 7 should be at least two due to the fact that the opening of two cross-pits 7 the vymgeani area of the methane-air mixture from the dam is equal to the width of the worked-out space enclosed between these cross-sections 7. When opening three or more cross-sections. the efficiency of removal of gas from the dam increases slightly, and when opening a single crosscut, the efficiency drops sharply.

As far as the bottom 15 of the column being worked, for example, open the cross-pitch 7-a, located at the shortest distance from the clearing-hole 15, and close the far cross-section 7 (5, leaving their number unchanged,

To increase the efficiency of exhaust gas from the developed space at the mouth of the air vent 5, install a suction

the fan, and to regulate the flow of the spray air 12 entering the drainage b-track, at the beginning of it, a lock chamber 13 with adjustable windows is installed.

Thus, the air 14 supplied to ventilate the clearing downhole 15 partially leaks into the developed space, where it is enriched with methane, and goes through the open drainage tips 7 to the drainage drift 6, where it is sucked up by air 12, then through the vent 5 at 5 the surface or is directed to the general jet of the shaft.

Claims (1)

I Formula of invention 1, A method for controlling gas injection in the development of contiguous formations, including mining the excavation floor with long pillars along a strike in a descending order and excavation using a targetless technology with removal of the gas-air mixture from the above-treated space through the drainage drift connected to the ventilation drift in order to increase the efficiency of the method by reducing the amount of preparatory work, the drainage drift is carried out along the underlying formation e of contiguous layers and connected to it by means of drainage holes or crosscuts with vent drifts first pillars vsh1elezha- boiling layers. 2, the method according to claim 1, characterized in that, in order to increase the efficiency of control of the gas fission by regulating the supply of the spiked air and dispensing the gas-air mixture from the exhausted space, at the mouth of the exhaust air outlet, at the beginning the drainage gateway is equipped with an airlock chamber with adjustable windows; in the drainage crosscuts, jumpers are installed with adjustable windows, while as the cleaning hole progresses, the adjustable crossbar window is opened, luminant move at the shortest distance from the face, and closed distal crosscut adjustable window, maintaining unchanged the number of open windows.  8 1 11 b 9 11 7 fi h 5 to I / V FIG. 2 Phage.d FIG H