三维高密度电法煤矿探水技术改进
Improvement of Water Exploration in Coal Mine with Three-dimensional High Density Electric Method
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摘要: 为提高三维高密度电法煤矿探水准确性,在现有方法的基础上进行改进。电极装置选用三电位电极系,实现了数据采集时的仪器自动收尾工作,丰富了数据体的信息;同时为提高反演效果,反演模型选用浅层垂直细分三维模型,反演方法选用具有不等式约束与光滑约束的双重约束最小二重法,计算方法上引用雅克比迭代对角矩阵进行处理,通过立体可视化处理得到地层顶底板三维数据体;而后运用切片技术精确圈定低阻异常范围,得到顶板砂岩地层、底板三灰地层和大屯断层带的富水性,以保证煤矿生产安全。Abstract: In order to improve the accuracy of three-dimensional high density electrical method for water exploration in coal mine, the present method is improved. The three-potential electrode system is selected as the electrode device to realize the automatic closing of the instrument during data collection and enrich the information of the data body. In order to improve the precision of inversion, the shallow vertical subdivision 3D model is selected. The least squares method with double constraint of inequality constraint and smooth constraint is selected as the inversion method. In the calculation method, the Jacobian iteration diagonal matrix is used. The 3D data volume of stratum roof and floor can be obtained by stereo visualization processing. By slicing technique, the water-rich properties of roof sandstone stratum, bottom three limestone strata and Datun fault zone are obtained so as to ensure the safety of coal mine production.
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