Deflagration permeability-increasing coal seam gas extraction promoting device and method

Abstract

The invention provides a deflagration permeability-increasing coal seam gas extraction promoting device and method. The deflagration permeability-increasing coal seam gas extraction promoting device comprises a controller, M deflagration cabins, a pulverized coal conveying pipe, a gas conveying pipe, M-1 packers and M plasma igniters. The pulverized coal conveying pipe sequentially penetrates through all the detonation cabins to provide pulverized coal and gas for the detonation cabins. The gas conveying pipe sequentially penetrates through all the detonation cabins to provide air for the detonation cabins. The plasma igniter is located in the detonation cabin and used for igniting a mixture of pulverized coal, gas and air in the detonation cabin to generate energy, the energy is discharged outwards through pressure relief holes in the outer wall of the detonation cabin to break down a coal seam, and directional permeability increasing is conducted on the coal seam. A control signal sent by the controller is received through the packer, and opening and closing of the pulverized coal conveying pipe, opening and closing of the gas conveying pipe and ignition of the plasma igniter are controlled according to the control signal. According to the invention, during detonation, the released energy is high, the power is strong, the destructiveness is great, the directional permeability increase of the coal seam can be realized, and the problem of low permeability of the coal seam during gas extraction is solved.

Description

technical field [0001] The invention relates to the technical field of gas extraction, in particular to a gas extraction device and method for deflagration and permeability-enhancing coal seams. Background technique [0002] Coal is the "ballast stone" for the safe and stable supply of energy in my country. However, coal mining is often accompanied by complex geological conditions of coal seams such as high gas and low permeability, which brings about a series of coal mine geological disasters, such as coal and coal mining. Gas outbursts, gas explosions and abnormal gas surges have seriously restricted the efficiency of coal mining. [0003] For gas drainage in low-permeability coal seams, special measures must be taken to increase the permeability of coal seams to effectively extract gas. Therefore, the efficient gas drainage of low-permeability coal seams is the current process of coal mine gas disaster management and coalbed methane resource utilization. Urgent problem to...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a deflagration anti-permeability coal seam gas extraction device and method, which can solve the problem of low coal seam permeability during gas drainage

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