瞬变电磁法探测浅层采空区的方法与应用

Detection of Shallow Strata Using Transient Electromagnetic Method in Case of Mine Goaf

煤矿(积水)采空区等隐蔽致灾因素是煤矿安全工作的重点和难点。结合实例介绍了瞬变电磁法使用中心回线装置在探查浅层煤矿(积水)采空区隐蔽致灾危险源中有关野外施工方法及资料处理解释的方法技术,对比分析了晚期和全区视电阻率算法、阻尼最小二乘法和Occam反演方法,发现Occam反演结果较优,探测成果得到钻孔验证,结果表明较大发射线框的瞬变电磁法能探测煤矿浅层积水采空区。

Coal mine goaf is one of the most important and the most difficult work in safety production. It introduces the principium, working method and data processing in shallow coal mine goal via an example. Shallow goal is detected by central loop system and after comparative analysis on tow kinds of apparent resistivity computing method, its range is found out according to the occam inversion result compared with damped least square result. The exploration conclusion has been proved by drilling data.