华泰煤矿采空区围岩变形及地表建筑物安全控制措施研究

Study on surface subsidence law of coal seam mining in Huatai Coal Mine

中文关键词: 应力平衡  采空区  地表沉降  沉降盆地中图分类号:P314文献标志码:A文章编号:1674-7801(2025)02-0380-09

英文关键词: stress balance  goaf  surface subsidence  subsidence basin

中文摘要:

      煤矿采空区改变了地层的原始应力状态，围岩在长期重力及地表建筑压力作用下会发生沉降变形，严重影响了矿区及周边居民的生命财产安全。以往研究主要针对于矿区本身及覆岩变化，结合地表建筑物的分析较少，本文以华泰煤矿可采煤层为研究对象，利用 FLAC3D软件对煤层开采后采空区引起的地表沉降及围岩变形展开深入研究，揭示了煤层开采引起的地表沉降规律，通过数值模拟结果分析得到以下结论:

英文摘要:

      The coal mine goaf changed the original stress state of the strata, and the surrounding rock undergoes settlement deformation under long-term gravity and surface building pressure. This seriously affect the life andproperty safety of the mining area and surrounding residents. Previous studies mainly focused on changes in the min-ing area and overlying strata, with limited analysis of surface buildings .In this study, the minable coal seams of theHuatai Coal Mine are examined. Furthermore, FLAC3D software is used to conduct in-depth research on the surfacesettlement and surrounding rock deformation due to goaf after coal mining. The law of surface settlement caused bycoal mining is revealed, and the following conclusions are obtained by analysing the numerical simulation results: (1) The maximum surface settlement due to the excavation of minable coal seams in Huatai Coal Mine is 1848.20mm, and the goaf leads to a certain scale of subsidence basin on the surface; (2) The settlement caused by goaf nearthe boundary of the mining area is approximately 550 mm; (3) The deeper the coal seam, the smaller the surface sub-sidence caused by goaf, and larger the range of surface subsidence generated. By analysing and studying the charac-teristics of surface deformation. targeted security control measures have been proposed，such as surface building lay-out, foundation treatment, and ring beam reinforcement, have been proposed. Improved the safety of buildings andstructures, providing guidance and basis for the development and utilization of goaf surfaces.