大采高综采顶板短悬臂梁-铰接岩梁结构与支架工作阻力的确定

针对大采高综采工作面矿压显现强烈,支架工作阻力确定依据不足等问题,采用现场实测、数值模拟相结合的方法进行研究得到：采高增加后,煤壁前方破坏面积及支承压力峰值明显加大、煤壁易发生片帮冒顶、采场顶板活动范围明显加大、顶板断裂线前移、岩层间离层量增加。依据大采高采场直接顶及基本顶新概念及新判别公式,提出大采高采场顶板易形成＂...

Roof structure of short cantilever-articulated rock beam and calculation of support resistance in full-mechanized face with large mining height

In order to solve the problems of strong strata behaviors and insufficient calculating basis of working resistance of support in fully-mechanized working-face with large mining height,the following strata behaviors were put forward by numerical simulation and site measurement:the bigger damage area,more serious rib spall,more abutment pressure peak,moving forward of roof facture line,increasing bed separation of roof.According to the new concept and distinguish basis,the structure of short cantilever-articu...