瞬变电磁在新集二矿西翼11-2煤层顶板砂岩裂隙水探测中的应用

Application of Transient Electromagnetic to the Detection of Roof Sandstone Fissure Water in the West Wing 11-2 Coal Seam in Xinji No.2 Coal Mine

新集二矿西翼11-2煤顶板砂岩裂隙发育不均一,含水层富水性相对较强;且西翼11-2煤各工作面回采期间,均有不同程度出水,对矿井安全生产造成了一定的影响。为减小11-2煤顶板砂岩裂隙水对工作面回采的影响,通常需全工作面施工钻孔,对顶板砂岩裂隙水进行探放。根据121109工作面11-2煤顶板砂岩裂隙水探测经验,总结出新集二矿西翼11-2煤顶板砂岩裂隙水赋存规律。采用瞬变电磁法,对11-2煤工作面顶板砂岩裂隙水进行探测;结合瞬变电磁探测的低阻区分布位置及工作面构造发育情况,布置11-2煤顶板砂岩裂隙水钻探探测工程,既可达到水害防治目的,又可节约钻探工程量,提高生产效率。

The sandstone cracks in the west wing 11-2 coal seam in Xinji No.2 Coal Mine are unevenly developed,and the aquifer is rich in water.Water gushing occurred during the stoping period at all working faces,which affected the safety of mine production.To reduce the impact of roof sandstone fissure water on the mining face,it is usually necessary to drill the full face to detect and release roof sandstone fissure water.Based on the experience in the detection of sandstone fissure water in the 11-2 coal roof of the No.121109 working face,the occurrence law of the sandstone fissure water in the west wing 11-2 coal seam in Xinji No.2 Coal Mine is summarized.The transient electromagnetic method is used to detect the fissure water in the roof sandstone of 11-2 coal working face.Combining the low-resistance area distribution position and development of the working face structure of transient electromagnetic detection,the 11-2 coal roof sandstone fracture water drilling detection project is arranged.This can not only achieve the purpose of preventing and controlling water hazards,but also save the drilling work amount and improve production efficiency.