High-pressureholepacking and pressure relief protection method for coal strata
A technology for coal and rock formation pressure protection, which is applied in the field of high-pressure sealing and pressure relief protection for coal and rock formations, can solve problems such as hidden safety hazards, poor sealing effects, and unimaginable consequences, and achieve in-situ pressure maintenance and pressure relief, which is easy to popularize and use Effect
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[0040] Such as Figure 1-Figure 5 As shown, a kind of coal seam high-pressure hole sealing pressure relief protection method of the present invention comprises the following steps:
[0041] Step 1. Drill a hole and extend the hole sealer into the drill hole: drill a hole at a designated position in the coal stratum to be pre-split, and extend the hole sealer into the borehole, and the high-pressure water injection pipe 3 is connected to the sealing Install the check valve 4 and pressure gauge on the high-pressure water injection pipe 3 located outside the coal seam, and the high-pressure water injection pipe 3 is located outside the coal seam and on the front side of the check valve 4 A high-pressure return pipe 5 is arranged on the pipe section of the high-pressure return pipe 5, and a stop valve 40 and a pressure regulating valve 6 are installed on the high-pressure return pipe 5. The pressure regulating valve 6 is installed at the end of the high-pressure return pipe 5, and...
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