【摘要】 危岩是迄今研究程度极其薄弱的地质灾害类型,而主控结构面受荷损伤断裂是危岩发育机理研究的核心技术。遵循应力强度因子的可叠加性假定,运用断裂力学方法及极限平衡理论,构建了倾倒式危岩主控结构面的应力强度因子计算方法,以及损伤-断裂判别式,并建立了主控结构面的断裂数值模拟方法,为深入研究危岩发育机理以及危岩灾害的有效治理奠定了理论基础。更多还原

【Abstract】 Hitherto,the problem of unstable rock is the weakest point in disaster study,the study on damage and fracture of control fissures under loads is the key part in study on mechanism of unstable rock development.Based on analyses of fracture tenacity of unstable rock and additional assumption of stress strength factor,the authors put forward a calculation method for stress strength factor of control fissures in toppling unstable rock by fracture mechanics and limit equilibrium theory in this paper.Further,the damage-fracture criterion,fracture numerical simulation method of control fissures are provided.The results are fit for research on mechanism of unstable rock development and effective control of unstable rock disaster.更多还原