【摘要】 针对富水厚砂层下分层开采问题,在分析矿井具体地质条件与开采条件基础上,采用地面钻孔冲洗液漏失量观测法对分层综采覆岩破坏高度进行了现场探测,确定了导水裂隙带发育高度,判定了矿井的覆岩破坏规律,为矿井水体下安全开采提供了参考依据。更多还原

【Abstract】 In view of a slicing mining problem under a watery thick sand stratum, based on an analysis on certain geological condition and mining condition of the mine,a leakage observation method of the surface drilling flushing liquid was applied to a site detection of the failure height of the overburden strata in the fully mechanized slicing mining. A development height of the water flow cracking zone was determined and the overburden strata failure law of the mine was judged,which could provide reference basis to the safety mining under a water body in underground mine.更多还原