瞬变电磁法在煤矿采空区勘查中的应用研究

为了核实某煤矿矿区采空区范围，在地质概况及地球物理特征基础上，采用瞬变电磁法研究了某煤矿二₁煤层采空区分布，分析了了工作布置、技术措施及数据处理步骤，根据视电阻率等值线图分析，得到在勘探区共划分了各类电性异常17个；根据勘探区顺二₁煤层电性分布特征，把勘查区分为3个异常区段；根据勘探区顺二₁煤层视电阻率切片图以及各测线视电阻率剖面图的异常形态，结合调查采空区的形态，对勘探区的二₁煤层采空区异常区进行推断解释，然后结合核实测量与钻探验证，得到了某煤矿内二₁煤层可靠的采空区范围及分布情况。研究为下一步资源储量核实提供依据。

Research on application of transient electromagnetic method in exploration of goaf in coal mine

In order to verify the scope of the goaf in a coal mine，based on the geological profile and geophysical characteristics，the transient electromagnetic method was used to study the distribution of the goaf in the Ⅱ₁ coal seam of a coal mine，and the work layout，technical measures and data processing steps were analyzed.According to the analysis of apparent resistivity contour map，a total of 17 electrical anomalies of various types were classified in the exploration area；according to the electrical distribution characteristics of the Ⅱ₁ coal seam in the exploration area，the survey was divided into 3 anomalous sections.The apparent resistivity slice map of the Ⅱ₁ coal seam in the exploration area and the abnormal shape of the apparent resistivity profile of each survey line，combined with the survey of the goaf form，inferred and interpret the abnormal area of the Ⅱ₁ coal seam in the exploration area.Then combined with verification measurement and drilling verification，a reliable range and distribution of the mined-out area of the Ⅱ₁ coal seam in a coal mine was obtained.The research provided a basis for the next step of resource reserve verification.