矿井瞬变电磁法在回采工作面富水异常区探查中的应用

通过矿井瞬变电磁法探测获得物探解释基础数据,借助Voxler软件绘制工作面顶板切片,对照地面瞬变电磁结果,初步确定5302工作面顶板方向K₈砂岩含水层及K₁₀砂岩含水层分布情况。借助三维成像技术直观显示视电阻率15Ω·m以下低阻等值体的几何分布形态,为钻探施工提供依据。经钻探验证:3号煤顶板40～45 m低阻异常为K₈砂岩含水层反映,上方60～80 m低阻异常为K₁₀砂岩含水层反映。经钻探验证,该区域分布有导水构造,水源为K₁₀砂岩含水层水。

Application of mine transient electromagnetic method in exploration of abnormal water-rich area of coal wining face

The basic data of geophysical interpretation were obtained by mine transient electromagnetic method detection.Using Voxler software to draw the roof slice of the working face and based on the transient electromagnetic results on the ground，the roof direction of 5302 working face was preliminarily determined.K₈ sandstone aquifer and K₁₀ sandstone water cut Layer distribution.With the help of three-dimensional imaging technology，the geometric distribution of low-resistance isoforms with an apparent resistivity of 15 Ω·m could be visually displayed to provide a basis for drilling construction.It had been verified by drilling that the 40~45 m low-resistance anomaly of No.3 coal roof was reflected by K₈ sandstone aquifer，and the 60~80 m low-resistance anomaly above was reflected by K₁₀ sandstone aquifer.It has been verified by drilling that there were water-conducting structures in this area and the water source was K₁₀ sandstone aquifer water.