摘要
矿井瞬变电磁测量在煤矿井下巷道中进行,干扰因素有别于地面瞬变电磁法。矿井瞬变电磁测量中的主要噪声为井下人文设施。本文依据物理模拟相似性准则,采用物理模拟方法,研究了瞬变感应电磁场在均匀全空间条件下及巷道空间影响下的分布特征,通过巷道内有无干扰因素对比总结出巷道空间内铁轨、锚网及工字钢对感应场的影响规律。结果表明,铁轨、锚网及工字钢的存在均使巷道内的探测信号增大,而且线圈处于巷道不同位置探测时受到的影响也不相同。通过对人文设施异常规律的总结,为以后的矿井物探工作提供一定的理论参考。
Mine transient electromagnetic surveying method is used in roadway,so interference factor is different from ground transient electromagnetic method.The noise of mine transient electromagnetic surveying comes from human installation under the mine.This paper,based on the similarity criterion of physical simulation,studies the distribution features of the transient electromagnetic field in the full space and under the influence of the roadway by physical simulation experiment,and by comparing whether the interference factors existing in the roadway space sums up the effect law of rail,metal netting and double T-iron on the induction field.The results show that the rail,metal netting and double T-iron in the roadway increase the signal detected,and the effect of the detection at different locations is different.The results of the research provide a theoretical guidance for future work of mine transient electromagnetic method.
出处
《工程地球物理学报》
2010年第6期679-683,共5页
Chinese Journal of Engineering Geophysics
基金
中国矿业大学国家大学生创新性实验计划(矿井典型突水构造瞬变电磁响应特征物理模型实验研究)资助
关键词
瞬变电磁响应
噪声
物理模拟
transient electromagnetic response
noise
physical simulation experiment
