Guoshen Sandaogou Coal Mine, CHN Energy Group
Mine Safety Technology Branch of China Coal Research Institute
State Key Laboratory of Coal Mining and Clean Utilization (China Coal Research Institute)

为精细化查明神府矿区亿源煤矿井田内原不明小煤窑采空区,为采空区治理提供科学依据,需开展瞬变电磁法、钻探及测井等综合勘查技术工作,以明确采空区分布范围及富水情况。结果表明:从测井曲线中可以看出煤岩层物性稳定,曲线形态明显,煤层具有高电阻率、低密度、低伽玛特性,煤层属导电性较差的高阻层(最高大于1000Ω·m),其他泥岩、砂质泥岩、砂岩等呈现相对低阻特征,煤层与围岩物性差异明显;瞬变电磁法采用280m矩形发射线框、发射频率Hz、增益22~25之间、发射电流8A、积分时间15s的参数组合进行探测,对已知采空区反映明显,推断3-1煤层房柱式采空区总面积0.985km2;通过钻探揭露了2-2煤和3-1煤房柱式采空区,验证了物探推断的3-1煤采空区。测井、瞬变电磁法探测、钻探相互依托、相辅相成,达到了精细化综合勘探的目的。

In order to finely identify the previously-mined unknown small coal mine goafs in the Yiyuan Coal Mine of Shenfu mining area, and provide scientific basis for management of goafs, it was necessary to carry out comprehensive exploration using the technologies of transient electromagnetic method, drilling, and logging, etc. , to investigate the distribution range and water abundance of the goafs. The results show that the physical properties of the coal seam were stable, and the curve shape was obvious from the logging curve. The coal seam had the characteristics of high resistivity, low density, and low gamma, which was classified as a high resistivity layer (up to Ω·m) with poor conductivity; while other mudstone, sandy mudstone, sandstone, etc. , exhibited the relatively low resistivity; the physical properties of the coal seam and surrounding rock differed significantly. The transient electromagnetic method adopted a detection parameter combination of m rectangular emission wire frame, emission frequency of Hz, gain of 22 ~ 25, emission current of A, and integration time of s for clearly reflected to the known goafs and it was inferred that the total area of the room and pillar mined-out areas in the coal seam was 0. 985 km2; the 2 coal and 3 coal room and pillar goafs were exposed, verifying the geophysical inference of the 3 coal goafs through drilling. Logging, transient electromagnetic exploration, and drilling were applied comprehensively, achieving the goal of refined and comprehensive exploration.

中国煤炭科工集团基金重点项目(2019-ZD004);煤科院基金(2022CX-Ⅱ-03)

刘立仁,徐慧,吕明杰,等.神府矿区采空区精细化综合勘探技术研究[J].煤炭工程,2024,56(4):28-35.