软岩大巷合理保护煤柱留设宽度的探讨

Discussion on Rational Width of Protective Coal Pillar for Mine Soft Rock Roadway

为了确定卧龙湖煤矿南翼大巷的合理保护煤柱宽度,基于满足保护煤柱稳定性及采场端部岩体破坏区理论,探讨了保护煤柱的合理宽度,并采用数值模拟对不同的留设煤柱宽度进行了应力场的比较分析。结果表明:保护煤柱宽度留设100m时,对于保持大巷的稳定性较为合适,另外,在工作面收作前,南翼轨道大巷还应该加固其帮部和底板。

In order to set up the rational width of the protective coal pillar in the south wing roadway of Wolonghu Mine, to meet the stability of the protective coal pillar and the rock failure zone theory of the coal mining face end, the rational width of ihe protective coal pillar was discussed. The numerical simulation was applied to the comparison analysis of the stress filed to the different width of the coal pillars. The results showed that when the width of the protective coal pillar was lOOm, the coal pillar would be suitable to keep the stability of the mine roadway. In additional the side wall and floor of the south wing railway roadway should be reinforced before the coal mining face terminated.