三软煤层上覆含水层富水性瞬变电磁法探测技术  

Transient electromagnetic method detecting technology of water-bearing occurence of aquifers in three-soft coal seam overlying rocks

作　　者：于师建[1] 

机构地区：[1]山东科技大学矿业与安全工程学院,山东青岛266590

出　　处：《煤炭科学技术》2015年第1期104-107,73,共5页Coal Science and Technology

基　　金：国家自然科学基金资助项目(51274135);山东省自然科学基金资助项目(ZR2011DM014)

摘　　要：为了评价在三软煤层煤2、煤4重叠开采时煤1油2的水文地质条件变化情况,对煤1油2首采工作面开展了瞬变电磁探测研究。在工作面两侧巷道采用多方向观测系统进行数据采集,数据处理后形成各探测方向电阻率剖面图和含水层顺层切片图。根据剖面图的电阻率分布特征,确定了含水层富水性相对强弱的电阻率分级,在切片图上圈定了2个含水层含水性相对较强的异常区。与实际工作面涌水量统计结果的对比分析表明:工作面涌水量变化与所圈定的较强含水异常区有显著的对应关系,瞬变电磁探测技术可有效确定含水层的富水异常区范围,为水文地质条件的综合评价提供依据。In order to evaluate the hydrogeological conditions of the coal1 ＆ oil2 mining under the three-soft coal seam geological conditions and coal2,coal4 overlapping mining conditions,the transient electromagnetic method detection was carried out on the first working face of coal1 ＆ oil2.Multiple direction observation system was used for data collection in the roadways of the working face.Therefore, the resistivity profiles of each detectional direction and slices of aquifers were worked out after data processing. According to the resistivity distribute of profiles, the distribution rate of resistivity which showed the relative strength of water-bearing occurence of aquifers was determined.The relative strong water-bearing anomaly areas were delineated in the slices.Through the comparative analysis of the results of transient elec- tromagnetic detection and the actual statistical results of water inrush, it could be seen that there was an obvious corresponding relation be- tween the changing of water inrush and the relative strong water-bearing anomaly areas.The detection results indicated that relative strong water-bearing anomaly areas could be determined accurately and effectively by using of transient electromagnetic detection technology and evaluated comprehensively the hydrogeological conditions.

关 键 词：三软煤层 工作面 瞬变电磁法 含水岩层 

分 类 号：P641.8[天文地球—地质矿产勘探]