高密度电法与瞬变电磁法在煤矿采空区的应用研究

Research on application of high-density electrical method and transient electromagnetic method in coal mine goaf

为进一步探究煤矿矿区采空区的分布特征问题,以义马煤田采空区实际情况展开研究,综合应用高密度电法与瞬变电磁法对目标矿井的采空区进行探查,应用高密度电法分析视电阻值异常区域,判断目标矿井的采空区空洞及充水问题;再应用瞬变电磁法分析视电阻值的分布特征与变化,以此明确目标矿井内存在的现有煤层及采空区分布情况。将高密度电法与瞬变电磁法2种模式下获得的探查结果进行汇总分析,进一步获得了测区内采空区引起的电阻率异常分布情况,以此对测区内的采空区进行全面的标记。通过基于地球物理原理与方法的现场钻探方法,印证应用高密度电法与瞬变电磁法对采空区进行探查得到的结果具有较高的准确性。

In order to further explore the distribution characteristics of goaf in coal mining area,the actual situation of goaf in Yima Coalfield was studied.High-density electrical method and transient electromagnetic method were comprehensively applied to explore the goaf of the target mine,the high-density electric method was applied to analyze the abnormal area of apparent resistance value,the cavity and water filling problems in the target mine were judged;the transient electromagnetic method was applied to analyze the distribution characteristics and change of apparent resistance value,so as to clarify the distribution of the existing coal seam and goaf in the target mine.The exploration results of high-density electric method and transient electromagnetic method in two modes were summarized and analyzed,and the abnormal distribution of resistivity caused by the goaf in the measuring area was further obtained,so as to comprehensively mark the goaf in the measuring area.Through on-site drilling methods based on geophysical principles and methods,it was confirmed that the results obtained from the exploration of goaf using high-density electrical method and transient electromagnetic method have high accuracy.