煤炭工程 ›› 2024, Vol. 56 ›› Issue (4): 28-35.doi: 10. 11799/ ce202404005

• 设计技术 • 上一篇    

神府矿区采空区精细化综合勘探技术研究

刘立仁,徐慧,吕明杰,李杰,陈凯,牟义   

  1. 1. 国家能源集团国神三道沟煤矿,陕西 榆林 719407
    2. 煤炭科学技术研究院有限公司 安全分院,北京 100013
    3. 煤炭资源高效开采与洁净利用国家重点实验室(煤炭科学研究总院),北京 100013

  • 收稿日期:2023-07-13 修回日期:2023-09-12 出版日期:2023-04-20 发布日期:2024-12-09
  • 通讯作者: 牟义 E-mail:MY3004@126.com

Research on fine comprehensive exploration technology for mined-out areas in Shenfu Mining Area

  • Received:2023-07-13 Revised:2023-09-12 Online:2023-04-20 Published:2024-12-09

摘要:

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1000 Ω·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280 m 矩形发射线框、发射频率25 Hz、增益22 ~25 之间、发射电流8 A、积分时间15 s 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. 985 km2;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。

关键词: 地球物理测井 , 瞬变电磁法 , 钻探 , 神府矿区 , 综合勘探

Abstract:

In order to finely identify the disasters caused by the previously unknown small coal mine goaf in the Yiyuan Coal Mine of Shenfu Mining Area, and provide scientific basis for goaf management, it is necessary to carry out comprehensive exploration techniques such as transient electromagnetic method, drilling, and logging to investigate the distribution range and water abundance of the goaf.The results show that from the logging curve, it can be seen that the physical properties of the coal layer are stable, and the curve shape is obvious. The coal seam has high resistivity, low density, and low gamma characteristics. The coal seam belongs to a high resistivity layer with poor conductivity (up to 1000Ω·m), while other mudstone, sandy mudstone, sandstone, etc. exhibit relatively low resistivity characteristics. The physical properties of the coal seam and surrounding rock differ significantly;The transient electromagnetic method adopts a parameter combination of 280m rectangular emission wire frame, emission frequency of 25Hz, gain of 22-25, emission current of 8A, and integration time of 15s for detection. The known goaf is clearly reflected, and it is inferred that the total area of the pillar type goaf in the 3-1 coal seam is 0.985km2;Through drilling, the 2-2 coal and 3-1 coal room pillar type goaf were exposed, verifying the geophysical inference of the 3-1 coal goaf. Logging, transient electromagnetic exploration, and drilling are interdependent and complementary, achieving the goal of refined and comprehensive exploration.

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