伊田煤业2105工作面松软煤层巷道围岩控制技术研究与应用

为保障伊田煤业2105运输顺槽机头硐室围岩的稳定,通过分析机头硐室处围岩赋存的具体情况,采用数值模拟的方式对节理发育回采巷道的变形规律进行记性分析,得出在主节理为15°时巷道围岩变形及塑性区发育最大,主节理发育倾角为65°时,巷道顶板塑性区的发育深度约为1.53 m,左帮下部和右帮下部的塑性区发育深度最大,分别为1.92和1.21 m,结合具体地质条件对巷道的支护方案进行具体设计,并进行矿压监测验证支护效果。结果表明,支护方案实施后,运输顺槽机头硐室顶底板和两帮变形量的最大值分别为12和9.5 mm,保障了回采巷道围岩的稳定。

Research and application of surrounding rock control technology of soft coal seam roadway in 2105 working face of Yitian Coal Industry

In order to ensure the stability of the surrounding rock of the headstock of the 2105 transport trough machine,by analyzing the specific conditions of the surrounding rock at the headstock,a numerical analysis was performed to analyze the deformation law of the joint-developed mining roadway.When the main joint was 15°,the deformation of the surrounding rock of the roadway and the development of the plastic zone were the largest.When the main joint development inclination was 65°,the development depth of the plastic zone of the roof of the roadway was about 1.53 m,and the plastic zones of the lower left and right lower sides develop.The depth was the largest,1.92 m and 1.21 m respectively.Combined with the specific geological conditions,the support scheme of the roadway was specifically designed,and the mining pressure monitoring was performed to verify the support effect.The results showed that after the implementation of the support scheme,the maximum deformation of the top and bottom heave and the two sides of the forward-slot machine head chamber and the two groups are 12 mm and 9.5 mm respectively,which guaranteed the stability of the surrounding rock of the mining roadway.