不同条件特厚煤层综放开采侧向支承压力分布特征

发布时间：2018-05-22 18:26

本文选题：特厚煤层 + 综放开采　；参考：《矿业研究与开发》2017年10期

【摘要】：以某矿特厚煤层开采为背景,运用理论计算和数值模拟的方法,分析了不同条件下特厚煤层综放开采侧向支承压力分布特征。基于极限平衡理论计算侧向支承压力峰值距煤壁距离,运用FLAC~(3D)有限差分软件分析工作面后方采空区顶板垮落之后,煤层厚度和煤层埋深对侧向支承压力分布的影响。分析表明:煤层厚度增加时,侧向支承压力峰值逐渐降低,但塑性破坏区逐渐增大,且应力峰值逐渐远离煤壁;而煤层埋深与侧向支承压力峰值正相关,塑性破坏区也随着埋深增加逐渐增大,且峰值越深入煤体。分析掌握了不同条件下侧向支承压力较低区域,将沿空巷道及煤柱布置在此区域,利于巷道支护,对煤矿安全高效开采具有重要意义。
[Abstract]:Based on the mining of extra thick coal seam in a certain mine, the characteristics of lateral support pressure distribution in fully mechanized caving mining of extra thick coal seam under different conditions are analyzed by using the method of theoretical calculation and numerical simulation. Based on the limit equilibrium theory, the distance between the peak value of the lateral support pressure and the coal wall is calculated, and the influence of the thickness of the coal seam and the depth of the coal seam on the distribution of the lateral supporting pressure after the roof collapse of the goaf behind the face is analyzed by using the software of FLACX 3D. The analysis shows that the peak value of lateral support pressure decreases gradually with the increase of coal seam thickness, but the plastic failure zone increases gradually, and the peak value of stress is gradually far away from the coal wall, while the depth of coal bed is positively correlated with the peak value of lateral supporting pressure. The plastic failure zone increases gradually with the increase of buried depth, and the peak value is deeper into the coal body. This paper analyzes and grasps the low lateral support pressure area under different conditions, and arranges the goaf roadway and coal pillar in this area, which is beneficial to the roadway support, which is of great significance to the safe and efficient mining of coal mine.
【作者单位】：太原理工大学矿业工程学院;重庆大学煤矿灾害动力学与控制国家重点实验室;
【基金】：国家自然科学基金项目(51274145)
【分类号】：TD353;TD823.254

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