矿用电磁波随钻伽马测井仪在桑树坪煤矿的应用

Application of Mine Electromagnetic Gamma Logging While Drilling Instrument in Sangshuping Coal Mine

桑树坪煤矿地质条件复杂,其奥陶系灰岩中含有薄层的泥岩,具有很强的隔水性,需在开采前对钻孔进行探放水,利用普通的定向钻进很难准确找到含水层的位置。介绍了矿用电磁波随钻伽马测井仪在此地区探放水中的应用,主要介绍整个系统的工作原理、及试验测试情况;试验结果表明矿用电磁波随钻伽马测井仪测量的钻孔轨迹及地层的伽马值可以为桑树坪煤矿奥灰系的探放水提供实时的地质导向。

The geological conditions of Sangshuping Coal Mine are complex,Ordovician limestone contains thin layer of mudstone and has a strong water barrier.It is necessary to detect and drain the borehole before exploitation,and use the ordinary directional drilling technology is difficult to accurately find the location of aquifer.This paper introduces the application of the electromagnetic wave drilling and gamma drilling system in the detection and drainage in this area,mainly introduces the working principle of the whole system,and test conditions,the experimental results show that the drilling trajectory and the gamma value which measured by mine Gamma MWD can be used to provide real time geological guidance for the detection and drainage of the Ordovician limestone.