危岩破坏机理的研究进展

危岩崩塌是全球性重大地质灾害，破坏具有突变性、隐蔽性和快速性的特点.其破坏机理至今尚未形成定论，研究也愈来愈为岩土工程界所关注.根据现阶段危岩破坏机理的线性和非线性科学研究成果，对比分析了各种方法的优缺点.通过建立危岩物理模型与力学模型，将其所受荷载全部集中于主控结构面，概化了危岩力学分析步骤，提出了采用准静力学解决危岩问题所存在的局限性.基于此对危岩破坏机理的研究发展趋势给予展望，为进一步研究提出了几个方向.

RESEARCH PROGRESS ON THE FAILURE MECHANISM OF UNSTABLE ROCK

The unstable rock collapse is a major global geological disaster with the characteristics of mutability, concealment and rapidity. Yet its failure mechanism is still uncertain, thus the research has received more and more attentions from geotechnical engineering circle. The advantages and disadvantages of various methods are compared based on the current linear and nonlinear scientific research results of failure mechanism. By establishing physical and mechanical models, the loads acting on unstable rocks are all concentrated on control fissures, which generalize the mechanical analysis steps. The limitations of quasi-statics theory in solving problems about unstable rocks are also discussed. From the above, the paper makes prospects on the research trends of failure mechanism of unstable rocks and proposes several directions for further research.