Stereo treatment method for low-occurrence and high-emission gas according to sources and zones
A technology of gas and storage, which is applied in the field of low-occupancy and high-emission gas separation and three-dimensional management, and can solve the problems of difficult pre-pumping, high gas emission management, etc.
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[0017] Taking the gas extraction of extra-thick coal seam mining in Datong mining area as an example below, the present invention will be further described in conjunction with the accompanying drawings:
[0018] Firstly, at the mining front of this working face 1, a row of continuous first gas drainage boreholes 2-1 are arranged at an interval of 50m vertically downward from the surface in the advancing direction of this working face 1 to the bottom of the coal seam 3 of this working face. The length of this working face 1 is 200m , the thickness of the coal seam 3 in this working face is 20m, the distance between the first gas drainage borehole 2-1 and the return airway 9 is 50m, and according to the advance position of the working face 1, at least three first gas drainage boreholes 2-1 Working at the same time, for the fractured area of the advanced coal and rock mass of this working face 1, this working face 1 and the goaf 4 of this working face, which are close to the are...
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