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针对某矿遗留煤柱下伏近距煤层巷道围岩变形大、不易控制等难题,采用数值分析方法,结合现场工业性试验,研究了遗留煤柱下伏煤岩体的强度系数和应力影响规律,优化了该矿巷道布置方式。研究结果表明:上覆煤层采完后,形成了以遗留煤柱为中心的五边形围岩强度极低区和半圆强度极低区,在进行巷道位置选取时,须避开该区域以保证围岩的稳定。
Aiming at the problems such as large deformation and difficult control of the surrounding rock of coal seam near coal seams in a mine left coal pillar, numerical analysis method and field test are used to study the strength coefficient and influence law of stress , Optimize the mine roadway layout. The results show that after mining the overlying coal seam, the pentagonal surrounding rock with extremely low strength and semi-circular strength is formed around the remaining coal pillar. When selecting the location of the roadway, the area should be avoided to ensure that Surrounding rock stability.