高密度电测深在工作面上覆含水层及采空区探测中的应用  

Application of detection of overlying aquifer and goaf on working face based on high-density electrical sounding

作　　者：雷鹏翔 权建巍 魏新帅 LEI Pengxiang;QUAN Jianwei;WEI Xinshuai(Shaanxi Shanbei Mining Hanjiawan Coal Co.,Ltd.,Yulin 719000,China)

机构地区：[1]陕西陕北矿业韩家湾煤炭有限公司,陕西榆林719000

出　　处：《陕西煤炭》2024年第7期127-131,165,共6页Shaanxi Coal

摘　　要：为超前识别韩家湾煤矿214203工作面上覆含水层及采空区的隐伏富水异常构造,为矿井防治水提供有效的技术支持,利用高密度电测深技术对其上覆含水层及采空区进行了高精度探测,设每个测点距为30 m,每个跑极点距10 m,使用防爆直流电法仪对各个测点进行测量。通过在地层中建立特定电场,发现随着工作面向前推进,探测区域受应力扰动和外界条件干扰可能会形成新的富水异常区域,同时对韩家湾煤矿214202工作面顶板含/导水构造进行分析。根据探测结果,划分了5处异常区域并对其分布范围和类型进行分析,对不同层段附近的电阻力进行分析发现异常横向分布位置基本相对应,异常分布特征相近似,有效识别了韩家湾煤矿煤层地质中富水异常区域,确定了水害异常区域的赋存状态和位置,为矿井安全高效生产保驾护航。In order to identify in advance the hidden water-rich abnormal structures in the overlying aquifer and goaf of the 214203 working face of Hanjiawan Coal Mine,and to provide effective technical support for mine water prevention and control,we use high-density electrical sounding technology to carry out high-precision detection to the overlying aquifer and goaf area.The distance between each measuring point is set at 30 m,and the distance between each running pole is 10 m.An explosion-proof direct current meter is used to measure each measuring point.By establishing a specific electric field in the formation,it is found that as the working face advances,new water-rich abnormal areas may be formed in the detection area due to stress disturbance and interference from external conditions.At the same time,the water-containing/water-conducting structure of the roof of the 214202 working face of Hanjiawan Coal Mine is analyzed.According to the detection results,5 abnormal areas are divided and their distribution range and type are analyzed.The resistance force near different layers was analyzed,and it is found that the abnormal lateral distribution positions are basically corresponding and the abnormal distribution characteristics are similar,thus effectively identifying the water-rich abnormal area and determining the occurrence status and location of the abnormal water hazard area to ensure the safe and efficient production of the mine.

关 键 词：高密度电测深技术 直流电法 富水异常区域 电法反演 水害防治 

分 类 号：TD15[矿业工程—矿山地质测量] P627[天文地球—地质矿产勘探]