浅埋煤层小煤柱巷道围岩支护设计

Design of surrounding rock support for small pillar roadway in shallow buried coal seam

结合台头前湾矿煤柱留设过宽的问题,采用理论分析、工程类比以及数值模拟的方法对2105工作面小煤柱护巷可能性进行研究,并进行工程试验。试验结果表明,选用6 m宽的小煤柱进行护巷,在巷道掘进期间,2105工作面巷道顶底板和两帮移近量为73 mm和47mm;在工作面正常开采期间,工作面后85 m范围内受采动影响,在工作面40 m范围内受采动影响最为剧烈,能够满足矿井安全生产需求。

Based on the problem of overwidth of coal pillar,by theoretical analysis,engineering analogy and numerical simulation,and the possibility of small coal pillar roadway protection in 2105 working face was studied.The test results showed that 6 m wide small coal pillars were selected for roadway protection.During roadway mining,the roof and floor convergence of roadway in 2105 working face and the two sides were 73 mm and 47 mm respectively.During the normal mining of the working face,the influence of mining within the range of 85 m,the most severe influence within the range of 4 0 m of the working face,which can meet the safe production needs of the mine.