伊田煤矿深部巷道合理煤柱尺寸优选分析

Optimization on Reasonable Coal Pillar Size Selection in Deep Roadway of Yitian Coal Mine

针对伊田煤矿深部矿井沿空巷道变形严重的问题,结合307工作面工况条件,采用数值模拟软件分别对煤柱在4 m、5 m、6 m、7 m、8 m、9 m、10 m、11 m、12 m、13 m、14 m、15 m不同宽度情况下进行数值模拟分析,从模拟的结果得知,煤柱宽度不同,巷道围岩的塑性区分布范围和影响深度有着较大的差异,巷道围岩周围应力大小及分布也随着变化,相对应的巷道围岩的变形量也有着较大的差别,从以上各方面的对比分析中得出,煤柱宽度为4~6 m时既能够保证煤柱受力的合理性,又能保持煤柱的稳定性。

In view of the serious deformation of the roadway along the deep mine of YiTian Coal Mine, combined with the working conditions of 307 working face, the numerical simulation software is introduced to determine the coal pillars’size with the sample sizes widths from 4 m, 5 m,…… to 14 m,15 m. The simulation results show that different in coal pillar corresponding different plastic zone distribution range and influencing different depth of the surrounding rock deformation of the roadway. The comparative analysis shows that the coal pillar width range of 4 ~6 m performs best, it can not only ensure the rationality of the force of the coal pillar, but also maintain the stability of the coal pillar.