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开采深度增加,地质力学环境比浅部复杂,深部动压回采巷道仍沿用浅中部的超前加强支护范围已不能有效控制动压巷道围岩变形。针对埋深762 m的某矿回采工作面顺槽的支护和超前加强支护范围,分析得出:回采和掘巷期间围岩变形不同,掘巷期间以底臌为主,而回采期间以顶板下沉为主;深部动压回采巷道超前支承压力影响范围明显增大,加强支护范围应大于采动剧烈影响区5~10 m。
Mining depth increases, the geomechanical environment than the shallow part of the complex, deep dynamic pressure mining roadway still follows the shallow middle of the advance to strengthen the support range has been unable to effectively control the dynamic pressure roadway surrounding rock deformation. For the depth of 762 m depth of a mining face along the trench support and advance to strengthen the support range, analysis: mining and roadway during the deformation of different surrounding rock, roadway ditches mainly to the mining period Roof subsidence mainly; deep dynamic pressure mining road leading support pressure significantly increased the scope of the impact, strengthening the support range should be greater than the mining affected area of 5 ~ 10 m.