倾斜煤层巷道稳定性与锚杆支护数值模拟研究

针对深井倾斜煤层巷道的特殊性,采用有限差分程序FLAC,分析巷道围岩应力、位移、塑性区分布,研究深埋倾斜煤层巷道围岩稳定性和锚杆支护控制围岩变形效果。结果表明,深井倾斜煤层巷道上帮且靠近煤层底板部位压力与变形破坏较大,是防止冲击地压和进行支护的重点区域,锚杆支护中适当加长上帮锚杆是合理的。本研究成果,对深井倾斜煤层巷道防止冲击地压、确定锚杆支护参数,有重要指导意义。

Numerical simulation study on the stability and bolting parameters of roadway in inclined coal

Aiming at the particularity of roadway in deep inclined coal seam,finite difference program FLAC is adopted to analyze stress,displacement and plastic zone distribution of wall rock,and study the stability of wall rock of roadway in deep inclined coal seam and the effect of controlling wall rock's deformation under bolting.From the results,the stress and deformation that at the upward side and near the bottom of the roadway is large,so these regions are critical for preventing rockburst and supporting,and it is reasonable to lengthen the bolt.The study harvest is of magnitude guidance meaning for preventing the rockburst and determining the supporting parameter of roadway in deep inclined coal seam.