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由于煤柱宽度以及相对工作面位置的不同,围岩应力重新分布将对巷道稳定性产生重要影响。运用FLAC数值模拟软件,对不同煤柱宽度的沿空巷道应力场分布规律进行了模拟研究。结果表明:巷道围岩稳定性是煤柱宽度变化引起巷道围岩应力分布及其演化共同作用的结果;开采深度为600～900 m时,煤柱宽度宜为3～4 m;当开采深度超过900 m时,煤柱宽度应为4～5 m。
Due to the difference of coal pillar width and relative working face position, the stress redistribution of surrounding rock will have an important influence on the stability of roadway. By using FLAC numerical simulation software, the distribution of stress field in gob-side entry with different pillars width was simulated. The results show that the stability of roadway surrounding rock is the result of the stress distribution and the evolution of surrounding rock in coal roadway due to the variation of coal pillar width. When the mining depth is 600-900 m, the coal pillar width should be 3 ~ 4 m. When the mining depth exceeds 900 m, the pillar width should be 4 ~ 5 m.