Application of High-density Electrical Method in Geological Exploration of Goaf in Coal Mine
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摘要: 为了评价高密度电法在煤矿矿区地质探测应用的适宜性和局限性，以山东省东营市某煤矿矿山为研究背景，选用高密度电阻率仪开展采空区地质勘探工作，选取了6组地层剖面进行反演分析，同时辅以钻探工作加以验证。分析结果表明：非采空区地层剖面的电阻率随深度增加逐渐增大，测试中电阻率从地表处的5 Ω·m沿深度升高至25 m深度位置的200 Ω·m，且具有明显的分层特点；3组采空区剖面的电阻率分布极不均匀，在剖面内部存在电阻率异常小的空洞区域；高密度电法可以用于圈定采空区的大致分布和范围，且高效便捷，在采空区勘探实际应用中具有较好的适宜性。Abstract: In order to evaluate the suitability and limitation of the application of high-density electrical method in geological exploration of coal mining areas, high-density resistivity meter was used in goaf geological exploration in a coal mine of Dongying, Shandong Province. Inverse analysis was conducted based on 6 stratigraphic sections, and verified by drilling work. The analysis results show that the resistivity of the non-goaf section increases gradually with the increase of depth, and has obvious stratification characteristics. The resistivity increases from 5 Ω·m at the surface to 200 Ω·m at 25 m depth. The resistivity distributions of the 3 goaf sections are extremely uneven, and there are cavity areas with abnormally low resistivity in the sections. The high-density electrical method can be used to delineate the general distribution and scope of goaf. Therefore, high-density electrical method is an efficient and convenient method with good suitability in the application of goaf exploration.
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Key words:
- high-density electrical method /
- coal mines /
- goaf /
- inverse analysis
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