迎采掘进巷道合理煤柱宽度确定

Determining Reasonable Pillar Width of Roadway Driven Heading for Adjacent Advancing Coal Face

针对东易煤矿4102工作面回风巷道迎4101回采工作面掘进带来的巷道布置难题,综合数值模拟、理论计算等方法,对距4101工作面不同距离处的侧向支承应力分布、顶板挠度分布和不同宽度煤柱内部塑性区分布进行了分析。结果显示,支承应力和挠度值呈"驼峰状"分布;当巷道布置在挠度峰值内侧时,煤柱内部仍有弹性稳定区,保证了煤柱稳定性和承载能力;结合东易煤矿实际生产条件,最终确定了东易煤矿4102回风平巷的护巷窄煤柱宽度为7 m。

Aiming at the problem of roadway layout of the roadway heading for adjacent advancing coal face in Dongyi Mine, combined the methods of numerical modeling calculation and theoretical analysis, we study the lateral support stress distribution, roof deflection distribution of different places around 4101 working face and plastic zone distribution in different width of coal pillar. It shows that the distribution shape of lateral support stress and deflection value is like ＂hump shape＂, and there is the elastic stability zone in the coal pillar when the roadway is arranged at the inside of the peak of deflection, which ensures strong carrying capacity of the coal pillar. Combined actual production conditions in Dongyi Mine, and finally it is determined that the narrow pillar width is seven meters.