煤层底板采动破坏深度探查技术

Exploration Technology of Coal Floor Mining Damage Depth

摘要: 针对朝川矿开采二₁煤21090工作面，利用超声波技术对工作面底板采动破坏情况进行探查和分析，依据距离工作面不同距离波速随深度的变化，确定底板采动破坏深度。探查结果表明，该工作面底板采动破坏深度集中在20.40~23.36 m，且深部岩层裂隙优先于浅部岩层发育。

Abstract: For Chaochuan Ⅱ₁ 21090 working face, ultrasonic wave technology is used to explore and analyze the floor mining damage situation, according to the velocity changes with depth, the mining damage depth is determined. The results show that the mining damage depth concentrates in 20.40 m to 23.36 m, and the facture develops from the deep rock to the shallow rock.