瞬变电磁法在山东某金矿尾矿库安全隐患排查中的应用

尾矿库是矿山安全生产的重大危险源之一，采空区的探测是尾矿库安全隐患排查治理的关键。为了验证应用瞬变电磁法探测采空区的有效性、研究其异常特征及获取此类异常的解释方法，首先选择深度为11～106 m不等的3条已知巷道和1处已知隧道进行了现场模拟试验，均取得明显的相对高阻异常反映；然后根据模拟试验结果在尾矿库区布设了总长度2 975 m 的10条探测剖面进行实测，得到了相似的高阻异常结果；最后选取数据处理后的Ⅰ、Ⅱ剖面作为实例，进行了异常解释。试验研究表明，瞬变电磁法应用于金矿尾矿库隐患查找是经济、快速、有效的，甚至对深度小于20 m塌陷危害严重的“半盲区”也有明显的反映。

Transient Electromagnetic Method to Investigating Potential Safety Hazard of Mine-Out Area in Tailings Pond of a Gold Mine

Tailings pond is one of the major hazard installations in safety production and the detection of mined-out areas is the key to investigate and control potential safety hazard to tailings pond. In order to verify the effectiveness of detection, explore the anomalous characteristics and obtain its interpretation with transient electromagnetic method（TEM）. Firstly, three known tunnels, which depth is from 11 m to 106 m, and a tunnel are simulated on the spot and achieve all the anomaly response of high resistance correspondingly. Secondly, the 10 probe profiles of total 2 975 m length on ground of the tailings pond were laid depend on the simulation results  and obtained a similar result of high resistance anomalies. Finally, the profiles No.Ⅰand No.Ⅱ were taken as examples after the data processing, and the anomaly results were explained. According to the report of mineral exploration and the mining design, the results of interpreting agreed with location of ore occurrence and mining technology. The results show that TEM be applied to find hidden dangers of the tailings pond and detect mined-out area is economic, fast and effective, and this method even has an obvious response for the “semi-blind” area of less than 20 m depth if the collapse of the consequences will be serious.