店坪煤矿采空区积水多道瞬变电磁探测技术试验应用

Test and application of multi-channel transient electromagnetic detection technology for water in gob area of Dianping Mine

为有效分析巷道与地面多道瞬变电磁探测技术的准确性,以店坪煤矿为例,对该矿10号煤层上覆采空区的积水进行探测。基于10号煤层的水文和地质条件,采用数值模拟的方式对双层采空区下瞬变电磁技术的影响特征进行模拟分析,并在10-200工作面回风顺槽内运用巷道与地面结合的瞬变电磁技术,对10号煤层上覆积水量进行探测,对数值模拟结果进行验证。结果表明,该种探测技术在双层采空区下,当上层和下层采空区均为确定的低阻采空区或当上层采空区为确定的高阻采空区,下层为低阻采空区时,探测效果好,对不同层位的采空区识别度高,数值模拟结果与实测结果一致,10-200工作面上方3号煤层存在着采空区积水。

In order to effectively analyze the accuracy of multi-channel transient electromagnetic detection technology in roadway and ground, Dianping Mine was taken as an example, the water in the overlying goaf of No. 10 coal seam of the mine was detected. Based on the hydrological and geological conditions of No. 10 coal seam, numerical simulation was used to simulate the influence characteristics of the transient electromagnetic technology in the double-layer goaf, and the roadway was used in the 10-200 working face as the return air roadway. The ground-bound transient electromagnetic technology detected the amount of water accumulated on the No. 10 coal seam and verified the numerical simulation results.The results showed that the detection technology was in the double-layer goaf, when the upper and lower goaf were both determined low-resistance goaf or when the upper goaf was the determined high-resistance goaf, the lower layer was low-resistance mining. In the goaf area, the detection effect was good, and the recognition of the goaf in different horizons was high. The numerical simulation results were consistent with the measured results. There was water in the goaf in the No.3 coal seam above the 10-200 working face.