高地应力破碎围岩巷道变形破坏特征及支护方式研究

李光,马凤山,郭捷,赵海军,寇永渊,兰剑,赵金田

Study on Deformation Failure Characteristics and Support Methods in Broken Rock Mass Roadway Under High Geo-stress

Guang LI,Fengshan MA,Jie GUO,Haijun ZHAO,Yongyuan KOU,Jian LAN,Jintian ZHAO

表1 不同支护方案及模拟结果对比

Table 1 Comparision of numerical simulation results of different support methods

编号 锚杆长度/m 间排距/m 底部支护 刚性支护 两帮移近量/cm 顶板下沉量/cm 底板隆起量/cm 塑性区面积/m2 1 2.25 0.5×1.0 - U型钢拱架 72.76 15.74 111.94 600 2 2.25 0.5×1.0 - - 184.91 42.57 133.31 1 600 3 2.25 0.5×1.0 喷锚网 - 44.76 16.90 30.15 520 4 2.25 0.5×1.0 喷锚网 U型钢拱架 15.80 5.72 7.95 240 5 2.25 1.0×1.0 喷锚网 - 52.56 20.53 35.47 1 200 6 3.00 1.0×1.0 喷锚网 - 38.17 23.13 29.63 850 7 2.25 0.5×2.0 喷锚网 - 66.98 28.53 42.90 2 020