基于瞬变电磁法的立槽煤采空区结构探测

    Detection of Mined-out Area Structure of Vertical Slot Coal Based on Transient Electromagnetic Method

    • 摘要: 以新疆乌鲁木齐碱沟煤矿立槽煤上部采空区结构与空间范围为探查目标,通过地面瞬变电磁法理论正反演数值模拟与现场实践,分析+495 m标高上部至地表+800 m标高立槽煤采空区的结构特征和空间分布范围,探测区西侧2处低阻异常分别对应碱沟矿工作面采空区和原安宁渠区煤矿采空区,东侧低阻异常为原安宁渠区煤矿采空区,西侧小矿采空区位于+518 m上部50 m内,结构规律;东侧小矿采空区位于+562 m上部50 m内,结构相对复杂。

       

      Abstract: Taking the upper goaf structure and spatial scope of vertical slot coal in Xinjiang Urumchi Jiangou Coal Mine as exploration target, through the forward and inversion numerical simulation of ground transient electromagnetic theory and site practice, we analyze the goaf structure characteristics and spatial distribution of vertical slot coal from the upper part of +495 m elevation to +800 m elevation. On the west side of the exploration area, two low resistivity anomalies correspond to the goaf of Jiangou Coal Mine working face and the original Anningqu Coalmine goaf, and the low resistance anomaly in the east side is the original Anningqu Coal Mine goaf. The west side of the small coalmine goaf is located at the upper of +518 m elevation within 50 m, and the structure is regular; the eastern side of the small coalmine goaf is located at the upper of +562 m elevation within 50 m, and the structure is relatively complex.

       

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