摘要
岩浆岩侵入煤层会破坏煤质,造成煤炭资源的浪费,同时更给煤矿的安全生产带来隐患,因而探测岩浆岩侵入煤层的范围具有重要意义。本文总结了岩浆岩侵入煤层后的电性特征,简要叙述了瞬变电磁法(TEM)的原理及特点,并以山西大同煤田同忻井田为例,介绍了瞬变电磁法探测岩浆岩侵入煤层范围的方法。岩浆岩侵入煤层后,引起二次场电位、视电阻率值这两个电性参数产生异常特征,根据这些异常特征可以有效探测岩浆岩侵入煤层范围。通过实例证明,利用瞬变电磁法探测岩浆岩侵入煤层的范围,是可行有效的。
The intrusion of igneous rocks into coal seams can not only affect coal quality and waste coal resources,but also bring hidden danger to the safety in production of coal mines. This work sum up the electrical characteristics of magmatic rocks intruding into coal seams,and briefly described the principle and characteristics of the transient electromagnetic method(TEM). Taking the Tongxin field in Datong coal field of Shanxi as an example,this work presented the principle of detecting the intrusion area of the magmatic rocks by TEM as follows. After intrusion of magmatic rocks,the anomalies of secondary-field potential and apparent resistivity can be produced. The characteristics of these anomalies permit to detect the area of rock intrusion. The example proves that it is feasible and effective to attain this end by the TEM method.
作者
杨阳
温建亮
谢维
刘思琴
YANG Yang;WEN Jianliang;XIE Wei;LIU Siqin(Shanxi Coal Geological Geophysical Exploration Surveying and Mapping Institute,Jinzhong,Shanxi 030600;School of Geosciences and Info-Physics,Central South University,Changsha,Hunan 410083)
出处
《地质与勘探》
CAS
CSCD
北大核心
2019年第5期1261-1267,共7页
Geology and Exploration
基金
山西省煤基重点科技攻关项目(编号:MQ2014-02)资助
关键词
瞬变电磁法
岩浆岩
煤层
同忻井田
大同煤田
山西
TEM
igneous rocks
coal seam
Tongxin coal field
Datong coalfield
Shanxi
