由掘进巷道围岩变形、及锚杆断裂现象，分析巷道的破坏形式为典型的留煤柱沿空掘巷巷道破坏显现。经理论计算，选取耦合让压应力显示锚杆，规格为Φ20mm ，L 2500mm ；顶锚杆排间距1000mm ×920mm ；帮锚杆排间距1000mm ×1000 m m ，采用新支护系统后，顶板与两帮最大移近量分别为50mm、90mm ，巷道围岩变形得到有效控制。%To prevent the surrounding rock deformation and bolt fracture in dynamic - Pressure -influenced roadway ,the author suggests the application of coupling yielding support with bolt specification of Φ 20 mm and L 2500 mm ,roof bolts spacing of 1000 mm × 920 mm and rib bolts spacing of 1000 mm × 1000 mm ,which would effectively control the surrounding rock deformation with maximum convergence of 50 mm in roof and 90 mm in two ribs .
展开▼
