邹庄煤矿陷落柱水文地质特征及防治技术

Hydrogeological characteristics and prevention technology of collapse column in Zouzhuang Coal Mine

  • 摘要:
    目的 为解决淮北邹庄煤矿D3物探疑似陷落柱的水患问题,需查明其空间形态与水文地质特性,并提出有效治理方案。
    方法 综合采用三维地震勘探、地面电法、钻孔验证与抽水试验等多种方法,查明了陷落柱的空间形态、导水性及富水特征,并依据《煤矿防治水细则》进行防隔水煤柱设计与治理方案设计。
    结果 该陷落柱呈上小下大的反漏斗型,中心轴近直立,平面呈椭圆状,长轴200 m,短轴110 m,发育高度约300 m;钻孔揭示多处破碎带(RQD = 40%~66%),抽水试验得出单位涌水量q = 1.368~2.32 L/(s·m),渗透系数K = 1.894~23.52 m/d,表明其强富水且与奥陶系灰岩含水层存在密切水力联系。通过“顺煤层压力”与“垂向水压力”双模型计算,确定防隔水煤(岩)柱宽度为85 m;同时提出,利用地面定向孔组灌注水泥与骨料,在太原组四灰层位构筑“阻水塞”,以实现对推覆体灰岩水的有效疏放与封堵。
    结论 本研究构建了“探查−评价−治理”一体化的陷落柱水害防治技术体系,查明了D3陷落柱的发育特征与水文地质性质,提出了具有针对性的治理方法,为类似地质条件下陷落柱水害防治提供了系统技术路径,具有重要工程应用价值。

     

    Abstract: In order to solve the water hazard risk of suspected collapse column in D3 geophysical exploration of Zouzhuang Coal Mine in Huaibei Coalfield, Anhui Province, it is necessary to find out its spatial morphology and hydrogeological characteristics, and put forward effective treatment plans. A comprehensive approach integrating 3D seismic exploration, surface electrical methods, borehole verification, and pumping tests was employed to determine the spatial morphology, water-conducting properties, and water-rich characteristics of the collapsed column. Based on the Coal Mine Water Prevention and Control Guidelines, a design for waterproof coal (rock) pillars and treatment measures was formulated. The collapsed column exhibits an inverted funnel shape, narrower at the top and wider at the bottom, with a nearly vertical central axis. Its planar form is elliptical, with a long axis of 200 m and a short axis of 110 m, and a development height of approximately 300 m. Borehole investigations revealed multiple fractured zones (RQD = 40%~66%). Pumping tests indicated a specific yield of q = 1.368~2.32 L/(s·m) and a permeability coefficient of K = 1.894~23.52 m/d, suggesting strong water-rich properties and a close hydraulic connection with the Ordovician limestone aquifer. Using dual-model calculations for "along-seam pressure" and "vertical water pressure," the required width of the waterproof coal (rock) pillar was determined to be 85 m. A treatment method was proposed involving the injection of cement and aggregate through surface directional borehole groups to construct a "water-blocking plug" at the Taiyuan Formation’s Fourth Limestone layer, enabling effective drainage and sealing of the nappe limestone water. This study establishes an integrated "investigation-evaluation-treatment" technical framework for preventing and controlling water hazards associated with collapsed columns. It clarifies the developmental characteristics and hydrogeological properties of the D3 collapsed column and proposes targeted treatment measures.

     

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