【作者】 赵兴东； 刘建坡； 于庆磊；

【Author】 ZHAO Xing-dong LIU Jian-po YU Qing-lei (School of Resource & Civil Engineering,Northeastern University,Shenyang 110004,China)

【机构】 东北大学资源与土木工程学院；

【摘要】 根据梁的受力理论,对层状顶板的破坏进行了力学分析。通过层状顶板破断的演化过程来研究其破断机理,探讨了层状顶板的应力分布状态。运用东北大学岩石破裂与失稳研究中心的岩石破裂过程分析系统(RFPA^2D)对高跨比对复合层状顶板稳定性的影响进行了数值模拟计算,得出了不同高垮比对巷道稳定性的影响情况。研究结果表明,顶板岩层破坏主要是拉应力与剪切应力作用的结果。更多还原

【Abstract】 Based on the theory of pressed-grider,the failure of strata roof in Mechanics is analyzed.The failure mechanism is investigated by evolvement process of failure of strata roof, and stress distribution of strata roof is discussed.Apply rock failure process analysis(RFPA^2D) of CRISR,numerical calculation on the influence in strata roof’s stability received by the ratio of high and span is processed,and conclusion on influence in roadway stability by different ratio of high and span is made in this paper.A final conclusion is drawn that the main causes of roof failure are tensile stress and shear stress更多还原