【摘要】 对分层介质中具有单一裂隙的巷道围岩问题,用边界元分区算法,沿裂隙面及介质分层面将围岩分区,对每个子域分别建立边界积分方程;在裂端配置1/4面力奇异单元,对张开或闭合状态的裂隙,既模拟了裂端位移规律,又模拟了裂端应力1/r变化规律。以应力强度因子为指标,依据岩石断裂理论,系统地分析了两层介质的弹性模量比、不同弹模比值时裂隙面的摩擦系数、水平分界面到巷道中心的距离、分界面倾角等因素,对裂隙围岩稳定性的影响,得出一些有价值的结论。这种研究方法适用于一般几何形状巷道的裂隙围岩问题。更多还原

【Abstract】 The multi-domain boundary element method is used to solve the laneway cracked surrounding rock problem with single cranny in the layered medium. The sub-regions are obtained by dividing the region along the cranny and the interface. The boundary integral equation is established in each sub-region. The traction singular quarter-point elements are collocated in the tip of the cranny. For the splay or closed cranny, not only the regularity of displacement but also the 1/ regularity of stress in the region of the cranny tip are modeled. Qua the target, the stress intensity factors are calculated. According to the rock fracture mechanics theories, the influence of the following factors on the stability of a cracked surrounding rock is analyzed systematically: modular ratio of the mediums, the friction factor on the cranny surface for different modular ratio, the distance between the center of laneway and the horizontal interface, the obliquity angle of the interface. And some valuable conclusions are obtained. This analysis method is suitable for the laneway with optional geometric shape.更多还原