COAL MINE DOWN-HOLE BOREHOLE PENETRATION IMPROVEMENT METHOD BASED ON CONTROLLABLE SHOCK WAVE TECHNOLOGY

摘要

A coal mine down-hole borehole penetration improvement method based on controllable shock wave technology comprises: pushing a controllable shock wave generation apparatus (3) into a borehole; after a hole opening sealing device (4) is installed at a hole opening of the borehole, injecting water into the borehole; when the borehole is fully filled with water, applying, segment by segment, repeated impact on each operation point multiple times using a middle portion of each operation segment as an operation point for shock waves. With water injected in the hole, the shock wave generation apparatus (3) does not need to work under the environment of explosive gas, and the shock waves can be efficiently coupled to a coal bed, addressing the current problems of high labor intensity and low safety of gas control.