深部大倾角工作面回采巷道支护参数优化  

Optimization of Mining Roadway Support Parameters in Deep Large Dip Face

作　　者：李跃文[1] 

机构地区：[1]上海大屯能源股份有限公司徐庄煤矿,江苏 徐州

出　　处：《土木工程》2021年第10期1062-1071,共10页Hans Journal of Civil Engineering

摘　　要：针对深部大倾角工作面回采巷道掘进中巷道变形较大、围岩难以控制的问题,结合采区地质条件,采用数值模拟方法对不同支护方案下的大倾角回采巷道支护效果进行分析。结果表明,模拟计算表明,围岩应力在该支护方案下有显著改善,最大水平主应力扩展区域增大明显,应力集中现象削弱;巷道帮部应力、顶板及上帮区域应力集中区域明显减小;支护方案对塑性区应变可以有效控制,特别是对煤柱受剪应力作用塑性区发育的控制作用效果提升明显。优化后的支护方案提高了围岩支护强度,显著提高了巷道围岩结构稳定性,能够适应和满足深部大倾角工作面的工程需求。Aiming at the problems of large roadway deformation and difficult control of surrounding rock in the excavation of mining roadway in deep large dip face, combined with the geological conditions of mining area, the support effect of large dip mining roadway under different support schemes is analyzed by numerical simulation method. The results show that the optimized support scheme can significantly improve the stress distribution of surrounding rock and weaken the stress concentration phenomenon. The vertical stress concentration area near the roadway side, especially the coal pillar side, decreases obviously. The stress concentration in the sheared area of roadway roof and upper slope area decreases. The support scheme can effectively control the strain in the plastic zone, especially the development of the plastic zone under the shear stress of the coal pillar. The optimized support scheme improves the support strength of surrounding rock, significantly improves the stability of roadway surrounding rock structure, and can meet the engineering needs of deep large dip working face.

关 键 词：深部 大倾角 回采巷道 数值模拟 

分 类 号：TD3[矿业工程—矿井建设]