Application of TEM in Detecting Inter-mining Small Coal Pit Group

摘要

In order to ensure the safe production of the opencast coal mine,the small coal pits should be detected by small multi loop Transient Electromagnetic Method.Firstly,the small coal pit geophysical model was built.And by physical modeling,the high-resistance goaf response characteristic was acquired.The detection engineering was carried out at HaiLaer opencast coal mine.The deviation between the exploration result and the actual boundary exposed by blasting was not greater than 5 meters.The applied result shows that: for the inter-mining coal pit,with the buried depth less than 100 meters,TEM could find out the distribution range and buried depth.It could offer the accurate location to blasting treatment,and the treatment effect is improved.So,this method is valuable for the exploration of small coal pit.