煤矿井下封闭不良勘探钻孔综合探查方法与实践

发布时间：2018-05-25 21:27

本文选题：瞬变电磁 + 低阻异常区　；参考：《煤炭科学技术》2017年08期

【摘要】：针对封闭不良地质勘探钻孔探测困难的问题,采用物探、钻探综合方法对圈定封闭不良勘探钻孔进行样查,由于封闭不良勘探钻孔可以连通煤层顶、底板含水层,其周边区域视电阻率较低,利用瞬变电磁法圈定了掘进巷道前方的低阻异常区,进而对异常区范围内施工钻孔进行验证,探查封闭不良勘探钻孔情况,对比麦垛山煤矿130604工作面巷道掘进实际揭露资料,与探查结果一致。结果表明:采用物探方法可以显著缩小异常区的范围,对异常区施工扇形探放钻孔,这样可以进一步确定是否存在封闭不良勘探钻孔,这2种方法相综合,可以有效避免巷道掘进过程中发生封闭不良勘探钻孔水害事故。
[Abstract]:In order to solve the problem of difficult exploration in closed poor geological exploration, the method of geophysical exploration and comprehensive drilling is used to carry out sample investigation on the delineated bad exploration borehole. Because the closed bad exploration borehole can connect the top of coal seam and the aquifer of floor, The apparent resistivity of the surrounding area is low, the low resistivity anomaly area in front of the tunneling roadway is delineated by transient electromagnetic method, and then the construction borehole in the abnormal area is verified, and the bad exploration drilling is probed. Comparing with the actual excavation data of 130604 face in Maiduishan Coal Mine, the results are consistent with the exploration results. The results show that the range of abnormal areas can be significantly reduced by using geophysical prospecting method, and the sector drilling holes can be constructed in abnormal areas, which can further determine whether there are closed bad exploration boreholes, and the two methods are integrated. It can effectively avoid the water hazard accident in the process of roadway tunneling.
【作者单位】：神华宁夏煤业集团有限责任公司麦垛山煤矿;
【分类号】：TD745.2

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