基于瞬变电磁法的采空区积水探测技术研究

Study on detecting goaf water technology based on transient electromagnetic method

为解决胜利煤矿6#煤层老窑采空积水区对本煤层及下部煤层开采造成的重大隐患,运用瞬变电磁法对胜利煤矿6#煤层进行井下物探,按照该方法的理论对探测结果进行解释分析。根据积水采空区电性最低,实体较高,无水采空区视电阻率最高的特性以及视电阻率的大小,得出在侧面沿主斜井方向视电阻率剖面图内,6#煤层与高阻异常区(采空积水区)相交且穿过,可推断出该段交线处中央部分为采空积水区,且采空范围较小,两侧为未采区。经现场井下钻探技术对物探结果进行验证,最终确定了6#煤层采空区积水范围。

In order to solve the major risks in coal mine 6#coal seam in Shengli coal mine gob caused by mining on the coal seam and the lower coal seam,the transient electromagnetic method is carried out for the geophysical prospecting of 6#coal seam in Shengli coal mine.Based on the principle of this method,the results of interpretation were explained and analyzed.According to the characteristics of the gob including the lowest electrical resistivity,the higher entity,the highest apparent resistivity with no water mined out area and the apparent resistivity as well.The apparent resistivity section diagram along the main shaft in the direction of the side,6#coal seam and the high resistivity anomaly zone(water in the gob)and passes through the intersection.It can be inferred that the central part of the intersection line is water in the mined out area,and the mining area is small,and the two sides are not mining area.The results of geophysical prospecting are verified by field drilling technology,and the water accumulation area of 6#coal seam gob is finally determined.