浅埋多煤层覆岩导水裂缝带发育高度实测研究

Actual Measurement Research on Development Height of Water Conducting Fracture Zone in Shallow Buried Multi-coal seam Overburden Rock

  • 摘要: 针对我国西部生态脆弱区浅埋煤层群开采中覆岩破坏与导水裂缝发育与矿井水害防治及生态环境保护密切相关的问题,以典型矿区为背景,采用导水裂缝带理论计算、相似材料物理模拟、UDEC数值模拟及4-2、4-3、5-2煤层现场实测相结合的方法,开展重复采动全过程覆岩破坏特征的“理论-模拟-实测”一体化对比验证。研究系统阐明重复采动下覆岩裂隙的叠加演化机制,量化多煤层条件下导水裂缝带发育参数,为浅埋煤层群开采区顶板水害精准防控、保水采煤方案优化及开采沉陷与生态损害评估提供重要理论依据与实践指导。

     

    Abstract: In view of the problem that the mine water disaster prevention and control and ecological environment protection are directly correlated with overburden rock failure and water conducting fracture development in shallow buried coal seam group mining in ecologically fragile zones of western China, taking a typical mining area as the background, a combination method of theoretical calculation of water conducting fracture zone, physical simulation of similar materials, UDEC numerical simulation, and on-site actual measurement of 4-2, 4-3, and 5-2 coal seams is adopted to carry out an integrated comparative verification of “theory-simulation-actual measurement” of the overburden rock failure characteristics during the entire process of repeated mining. The research systematically clarifies the superposed evolution mechanism of overburden rock fissures under repeated mining, and quantifies the development parameters of water conducting fracture zones under multi-coal seam conditions, which provides an important theoretical basis and practical guidance for precise prevention and control of roof water disasters, optimization of water holding coal mining schemes, and evaluation of mining subsidence and ecological damage in shallow buried coal seam group mining zones.

     

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