浅埋煤层开采裂隙演化特征及地表移动规律研究

Fracture evolution characteristics and surface movement law of shallow coal seam mining

  • 摘要:
    目的 为深入探究浅埋煤层开采过程中裂隙演化特征及地表移动规律,优化开采方案,实现煤矿安全、绿色、高效开采,
    方法 以6101工作面为研究对象,采用UDEC数值模拟软件模拟开采过程中裂隙发育情况,通过分析不同推进距离下的裂隙发育特征,研究裂隙发育过程、形态与分布,分析地表移动类型、发展过程,并提出地表移动控制技术。
    结果 结果表明,开采过程中,裂隙初期萌生,随后扩展连通,后期趋于稳定,裂隙形态多样,垂直方向宽度和高度向上递减,平面上围绕采空区呈近似椭圆形分布。地表移动包含下沉、水平移动和多种形式的裂隙发育,工作面推进至30 m和55 m时地表下沉量达到最大值;充填开采技术可使地表最大下沉量减少60%以上。
    结论 提出的控制技术为类似条件下的煤炭开采提供了科学依据和技术支持,对保障煤炭安全高效开采、保护矿区生态环境具有重要意义。

     

    Abstract: In order to deeply explore the fracture evolution characteristics and surface movement law in the mining process of shallow buried coal seam, optimize the mining scheme, and realize the safe, green and efficient mining of coal mine, taking 6101 working face as the research object, UDEC numerical simulation software was used to simulate the fracture development in the mining process. By analyzing the fracture development characteristics under different advancing distances, the fracture development process, shape and distribution were studied, the type and development process of surface movement were analyzed, and the surface movement control technology was put forward. The results show that during the mining process, the fractures initiate at the initial stage, then expand and connect, and tend to be stable in the later stage. The fracture morphology is diverse, and the width and height in the vertical direction decrease upwards. The plane is approximately elliptical around the goaf. The surface movement includes subsidence, horizontal movement and various forms of fracture development. When the working face is advanced to 30 m and 55 m, the surface subsidence reaches the maximum value. Filling mining technology can reduce the maximum surface subsidence by more than 60%. The proposed control technology provides scientific basis and technical support for coal mining under similar conditions, which is of great significance for ensuring safe and efficient coal mining and protecting the ecological environment of the mining area.

     

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