【摘要】 对比目前常用的采煤面底板岩层变形与破坏测试方法特点,将地电性动态测试运用到采煤面底板岩层破坏规律测试中,通过在井下巷道底板中布置一定数量测量电极,煤层底板施工一定角度钻孔安装圈式电极,形成固定巷-孔立体测试空间,并根据采煤面回采进度测取不同时期地电参数变化特征分析底板破坏带发育规律及程度。现场探测应用表明:电阻率值的时空变化可以连续动态直观清晰分辨出底板岩层结构破坏发育及破坏带范围;激励电流对岩层裂隙变形与发育位置具有较好灵敏性和指示作用;该测试方法具有针对性,其施工简单,费用较低,不仅对矿井安全生产具有现实意义,对其他岩土工程也有重要参考价值。更多还原

【Abstract】 Compared with conventional detection of deformation and failure of floor in mining workface, the dynamic detection method of geo-electricity was adopted to detect deformation and failure of floor strata.Through bore drilled in floor strata and floor rock of the coal seam in laneway,the detecting section between two surveys is formed.Then through 64 poles fixed in different location of surveys,the characteristics of the electric field in the floor rock of different periods can be surveyed according to the mining plan.Then the different stages of rock’ s geo-electricity of detecting area can be obtained, it really reflected the law of overlaying strata movement and fracture development.The results of application show that the dynamic detection method of geo-electricity has several characteristics:to track and identify the process of deformation and failure of floor strata,and determination of the cracked field; the exciting current for rock deformation and fracture development zoom has an indicative function and sensitivity.This method has low cost,accurate results and dynamic detecting characteristics.更多还原