System and method for improving permeability of coal by means of periodic hammering by aid of high-pressure air pulses and water waves
A technology of high-pressure air and high-pressure gas, which is applied in the direction of mining fluid, earth drilling, gas discharge, etc., can solve the problems of small drainage influence range, short drainage timeliness, high drainage cost, etc., to improve safety and production efficiency, The effect of reducing economic cost input and simplifying the operation process
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Embodiment 1
[0032]This embodiment proposes a high-pressure air pulse water wave periodic hammering coal body anti-reflection system, including a water filling device, an air charging device, and fracturing equipment. The fracturing equipment includes a high-pressure gas release pipe 14, a sealing capsule 13, and a high-pressure double-layer conveying pipe , the high-pressure double-layer conveying pipe comprises a high-pressure double-layer gas delivery inner pipe 9 of an inner layer and a high-pressure double-layer water delivery outer pipe 10 of an outer layer, and the high-pressure double-layer gas delivery inner pipe 9 ends are connected with a high-pressure gas release pipe 14, and A number of one-way gas release holes 15 are distributed on the gas release pipe 14, and the sealing capsule 13 is arranged on the outer wall of the high-pressure double-layer delivery pipe close to the position of the high-pressure gas release pipe 14; the water filling device communicates with the high-pre...
Embodiment 2
[0040] This embodiment proposes a method of periodically hammering the coal body with high-pressure air pulse water waves for anti-reflection, using the high-pressure air pulse water waves periodically hammering the coal body anti-reflection system in Example 1, and high-pressure air pulse water waves periodically hammering the coal body for anti-reflection The method includes the following steps:
[0041] Step 1. Construct the layer-penetrating fracturing hole 12 in the floor rock layer 16 of the underground rock roadway to enter the target coal seam 17, and control holes can be arranged on the side. Connect to the high-pressure double-layer water delivery outer pipe 10 and the high-pressure double-layer gas delivery inner pipe 9, then pass through the longitudinal center of the sealing capsule 13 as a whole, and send the high-pressure gas release pipe 14 and the sealing capsule 13 into the fracturing hole together 12, by filling the sealing capsule 13 with high-pressure gas,...
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