基于微震监测和现场实测的煤层顶板导水裂缝带发育高度研究

在充分分析高庄煤矿地质资料的基础上，采用并行电法对煤层顶板岩层破裂过程进行现场监测，分析垮落带和导水断裂带的动态发育规律。分别采用孔内视电阻率法、直流电法进行超前探测、电极电流比值法进行反演解译，并将反演结果与“三下”开采规范经验公式计算结果进行对比。结果表明：高庄煤矿3_上303工作面顶板垮落带发育高度为20 m，垮采比为3.7；导水断裂带高度为54 m，裂采比为10.2；采动应力超前影响距离最大为48.6 m；现场实测结果与计算结果基本一致，动态监测反演结果真实可靠。将孔内视电阻率法和直流电法超前探测相结合，有效解决了松散层不易成孔的难题，为煤层顶板垮落带、导水断裂带发育高度监测提供了一种新方法。

Study on the development height of

Based on the analysis of geological data of Gaozhuang Coal Mine, the parallel electrical method was used to monitor the fracture process of roof strata, and the dynamic development law of caving zone and water-conducting fracture zone was analyzed. The method of apparent resistivity parameter in a borehole, the direct current method of advanced detection and electrode current method were respectively used for inversion interpretation, and the inversion results were compared with the calculation results of the regulations for coal mining under buildings, water bodies and railways. The results show that the height of roof caving zone in 3_up303 working face of Gaozhuang Coal Mine is 20 m, and the ratio is 3.7 between caving zone and mining height; the height of the water-conducting fractured zone is 54 m, and the ratio is 10.2 between fissure zone and mining height; the maximum leading influence distance of mining stress is 48.6 m; the field measured results are consistent with the calculated values, indicating that the dynamic monitoring and inversion results are reliable. The combination of a borehole apparent resistivity parameter method and the direct current method for advanced detection effectively solves the problem that the loose layer is not easy to form holes. It provides a new method for monitoring the development height of roof caving zone and water-conducting fault zone of coal seam.