综放沿空巷道顶煤受力变形分析

综放沿空巷道顶煤受力变形分析 English Version

基金项目: 国家自然科学基金!资助项目 (597340 90 )

1.Xiangtan Polytechnic University Xiangtan 411201 China 2.China University of Mining and Technology Xuzhou 221008 China

摘要: 根据砌体梁理论 ,老顶以给定变形方式作用于综放沿空巷道围岩 ,应用能量原理分析了巷道围岩的变形机理 ,建立了巷道顶煤的力学模型 ,运用变分法对老顶给定变形下顶煤的变形进行了初步求解 ,并对顶煤下沉量与支护阻力、煤体弹性模量、巷道宽度的关系进行了探讨。
- 综放沿空巷道 /
- 巷道顶煤 /
- 变分方法 /
- 顶煤下沉量
Abstract: According to the voussior beam theory, the main roof applies a given deformation on the surrounding rock of roadway driving along next goaf in sublevel caving face. The deformation mechanism of surrounding rock is analyzed by the energy principle,and the mechanical model of roadway roof coal is established. The mechanical problem of the roadway roof coal under a given deformation is solved by the variation approach, and the relationship among the subsidence of the roadway roof coal, the support resistance, the height and elastic modulus of roof coal,and the width of the roadway are further discussed.
- road driving along next goaf in sublevel caving face /
- roadway roof coal /
- variation approach /
- subsidence of roadway roof coal