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为探究深井巨厚砾岩下覆岩运动规律以及冲击地压发生机理,针对华丰煤矿巨厚砾岩覆岩运动引起的冲击地压灾害现状,运用实验室相似材料模拟试验方法,研究采场上覆岩层运动规律及巨厚砾岩诱发采场冲击地压危险性。结果表明,随着工作面的推进,采场上覆岩层破坏基本是以“拱”的形式不断向前和向上发展,在巨厚砾岩层处离层高度及跨度发展到最大;上覆巨厚砾岩离层垮落是诱使采场冲击地压发生的根本原因。在此基础上,提出华丰煤矿防治冲击地压的根本措施巨厚砾岩离层空隙注浆充填技术。
In order to explore the law of overlying strata movement and the mechanism of rockburst in deep huge conglomerate, aiming at the status quo of rock burst caused by overburden strata movement in Huafeng coal mine, Law of overburden strata movement and danger of rockburst induced by huge thick conglomerate. The results show that with the advancement of working face, the failure of overlying strata in stope mainly progresses forward and upward in the form of “arch”, and develops to the maximum in the thick conglomerate layer. The overlying strata Giant conglomerate conglomerate rock collapse is the root cause of induced ground pressure. On this basis, the basic measures for preventing rockburst in Huafeng Coal Mine are put forward.