瞬变电磁成像技术在采空区积水探测中的应用

The Application of Transient Electromagnetic Imaging Technology to Goaf Water

针对煤矿生产和建设中的水害探测问题,采用瞬变电磁法同一回线装置对山西某煤矿煤层采空区积水分布范围进行了探测。结合山西某煤矿10号煤层的应用实例,实现了对煤层的电阻率水平切片,同时对瞬变电磁成像技术进行了研究,并在煤矿采空积水区施以钻孔验证。结果表明:瞬变电磁成像技术直观地表现出采空区的积水状态,对异常区位置的探测结果更加精确、具体,便于异常区的判定、后期钻探及其他防治措施的确定。

For the problem of water damage detection in coal production and construction, TEM loop is used to detect the goal water distribution of one coal mine in Shanxi province. Transient electromagnetic imaging method was mainly used in the goal water. Combining with the application of 10th coal seam in one Shanxi coal mine, the horizontal section of seam resistivity is realized, and the transient electromagnetic imaging technology is studied. Drilling in coal mine goal water district is used to verified. The results show that the transient electromagnetic imaging can visually express the goal water state, at the same time, the abnormal area is more accurate and specific, which is advantageous for the judgement of the abnormal area and the determination of late drilling and other control measures.