摘要
地下含水体作为露天煤矿开采隐蔽致灾因素,开采前应予以查明。利用瞬变电磁法(TEM)对低阻体响应十分敏感的特性,能较准确地查明地下含水体的赋存情况。以某露天煤矿为应用案例,利用瞬变电磁探测技术,统计了测区低阻异常体的电性特征,确定了测区低阻异常体的形态和走向,初步圈定了地下含水体分布范围及埋深。经后期煤矿采掘验证,地下含水体实际分布情况与瞬变电磁法圈定范围基本吻合,表明瞬变电磁法在查明露天煤矿地下含水体方面的有效性。
As a hidden hazard factor in opencast coal mining, underground water should be identified before mining. The transient electromagnetic method(TEM) is very sensitive to the response of low impedance body, which can accurately identify the occurrence of underground water body. Taking an open-pit coal mine as an application case, the electrical characteristics of low-resistivity anomalous bodies in the survey area were statistically analyzed by using transient electromagnetic detection technology, and the shape and trend of low-resistivity anomalous bodies in the survey area were determined. After coal mining, the actual distribution of underground water body is basically consistent with the delineation range of tem, indicating the effectiveness of tem in identifying underground water body of opencast coal mine.
作者
李健
LI Jian(Gansu Coal Geological Exploration Institute,Lanzhou 730000,China)
出处
《煤炭技术》
CAS
2020年第7期54-56,共3页
Coal Technology
关键词
瞬变电磁法
露天煤矿
地下含水体
transient electromagnetic method
opencast coal mine
underground water body
