关键词: 岩土工程, 危岩, 稳定性分析, 研究现状, 研究趋势

Abstract: Dangerous rock collapse is the main geological disaster type in the Three Gorges Reservoir area and even in the whole western region. It has such basic characteristics as extensive nature, suddenness, concealment and disaster severity. Based on the search and analysis of research literature at home and abroad and combined with the authors research practice in the Three Gorges Reservoir area for many years, the research status of unstable rock stability analysis was generalized into four aspects, i. e, unstable rock formation mechanism, stability calculation method of unstable rock, stability evaluation method of unstable rock and application of numerical analysis. By systematically combing the research in every aspect, it is found that both domestic and foreign scholars have focused on the problem of plane propagation of crack at the end of main structure surface of unstable rock; the influence mechanism of stability and deformation characteristics of unstable rock has been systematically studied, but the spatial form of unstable rock is not considered; there is a lack of research on the three-dimensional fracture stability of the main control structures where the surrounding area is penetrating and the middle region is not penetrating. In addition, it is pointed out that 3 research directions in the further study of unstable rock stability analysis should be focused, namely, the three- dimensional fracture expression of the unstable rock failure, the prediction of unstable rock stability and the monitoring and early warning technology for unstable rock stability.

Key words: geotechnical engineering, unstable rock, stability analysis, research status, research trend