巨厚砾岩诱发冲击地压相似材料模拟试验研究

Similar Material Simulation Test Research on Rock Burst Induced by Overlying Thick Conglomerate Strate Movement

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。

Aiming at dealing with the current situation of rock burst induced by super-thick conglomerate layer movement in Huafeng coal mine, the law of stratum movement and risk of rock burst caused by overlying thick conglomerate strate were studied with the method of similar material simulation test. The results show that fracture of overlying rock strata is developed in the form of ＂arch＂, and abscission layer height and span develop the maximum at the thick conglomerate layer. Also, abscission caving of overlying thick conglomerate strate is the fundamental cause of rock burst. On this basis, technology of grouting bed separation was put forward as an important measure for preventing the rock burst.