铁轨影响下煤层底板瞬变电磁探测技术应用  

Application of Transient Electromagnetic Detection Technology in Coal Seam Floor Under the Influence of Tracks

作　　者：王明明[1] 刘志新[1,2] 雷枫[1] 

机构地区：[1]中国矿业大学资源与地球科学学院,江苏徐州221116 [2]深部岩土力学与地下工程国家重点实验室,江苏徐州221116

出　　处：《煤矿安全》2013年第4期162-164,共3页Safety in Coal Mines

摘　　要：为了减少铁轨对瞬变电磁探测煤层底板的影响,采用物理实验模拟和井下试验相结合的方法,研究了铁轨影响下煤层底板的瞬变电磁响应特征,并总结出瞬变电磁响应规律。结果表明:受铁轨影响的瞬变电磁感应电位明显增大,感应电位衰减时间延长,含水异常区的视电阻率值明显低于未受铁轨影响时的视电阻率值。经校正得到的视电阻率断面图能准确反映煤层底板含水异常区的位置范围和赋水情况,提高了铁轨影响下瞬变电磁探测煤层底板含水异常区的准确性。In order to reduce the influence of tracks to transient electromagnetic detection of coal seam floor,it studied the transient electromagnetic response characteristics of coal seam floor under the influence of tracks and summarized the rule of transient electromagnetic response by physical experimental simulation and underground experiment.The results showed that the transient electromagnetic induction potential increased significantly,the decay time of induction potential was prolonged,the apparent resistivity values were significantly lower than the values without the influence of tracks in the abnormal aquifer areas.The corrected apparent resistivity profile could accurately reflect the position,range and water-bearing condition of abnormal aquifer areas of coal seam floor,which improved the accuracy of transient electromagnetic detection for the abnormal aquifer areas of coal seam floor under the influence of tracks.

关 键 词：物理模拟 瞬变电磁 铁轨影响 煤层底板 

分 类 号：TD745[矿业工程—矿井通风与安全]