复杂地形条件下不积水采空区的TEM探测

TEM Detection for Gob Without Water Under Complex Terrain Conditions

受复杂地形条件的影响,快速准确探查不积水老窑采空区是煤矿地球物理勘探的研究难点。通过研究瞬变电磁法在煤矿水文物探中的探测技术,利用该方法受地形影响较小的特点,回避对低阻体反应敏感的思路,选用小发射线框、高发射频率、合适的时间窗口,在其他物探方法无法施工的地形复杂地区,完成了不积水采空区的探测工作,总结了其在探测资料中的高阻电性反映特征,推断的不积水采空区范围与巷道掘进揭露情况相符合,表明该方法可以用于煤矿高阻采空区的定位探测。

Influenced by complex terrain conditions, it is difficult for research of geophysical prospecting to rapidly and accurately detect gob without water in abandoned mines. Through the study of transient electromagnetic method for the application of hydrologic geophysi- cal detection technology in coal mines, the advantage of the characteristics of method is less affected by terrain, to avoid sensitive reac- tion of the ideas of low resistance body, choosing a small launch wire frame, high frequency, suitable time windows, the exploration work finally completed on the gob without water in the complex terrain that other geophysical prospecting methods cant construction are- as, Through summarizing the reflect characteristics of high resistance electrical of the detection data, and infer the gob without water scope. Detection results have been verified in the tunneling period, which shows that the transient electromagnetic method can be used for gob detection of high resistivity in the mines.