不同感应类电法勘探的煤矿采空区积水探测对比研究

Detecting comparative study on goaf hydrops of coal mine by different induction electrical methods

为对比不同电法勘探确定矿井采空区含水体分布规律,以鸡西矿区某煤矿工程为实例,应用瞬变电磁法和大地电磁法的四种设备对煤矿采空区积水体进行探测,通过探测反演成果与已知资料对比分析,进行钻探验证研究。结果显示,四种探测设备反演结果的视电阻率变化特征基本相似,都能较好地反映出电性层在垂向上的分布规律,视电阻率绝对值差别不大,所得电阻率值为0~100Ω·m,探测推断的采空区积水区域范围大致相同,并指出水源的导水通道,与现场实际资料及钻探结果基本一致,验证了这两种方法的有效性,其中瞬变电磁法的PROTEM-57瞬变电磁仪勘探结论更为精确。该研究可为煤矿防治水工作提供技术支持,具有十分重要的工程应用价值。

In order to determine the distribution law of water bearing body in mine goaf by comparing different electrical prospecting,taking a coal engineering in Jixi mining area as an example,four kinds of equipments of Transient Electromagnetic Method and Magnetotelluric Method are applied to detect goaf hydrops of coal mine.Through comparative analysis of detection inversion results and known data to carry out the drilling verification research.The results show that the apparent resistivity variation characteristics of the inversion results of the four kinds of detection equipment are basically similar,which can reflect the vertical distribution law of electric layer,the apparent resistivity in absolute value is similar,the obtained resistivity value is 0~100Ω•m,which can detect and refer that the regional range of goaf hydrops is approximately same.It is pointed out that the underground watercourse of water source is basically consistent with the actual field data and drilling results,which verifies the effectiveness of the two methods,and the exploration conclusion of PROTEM-57 is more accurate.The research can provide technical support for mine water control and has very important engineering application value.