Status Quo and Trend of Unstable Rock Stability Analysis

doi:10.3969/j.issn.1674-0696.2018.10.09

Abstract

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

摘要： 危岩崩塌灾害是三峡库区乃至整个西部地区主要地质灾害类型，具有泛生性、突发性、隐蔽性及致灾严重性等基本特性。基于对国内外研究文献的检索分析并结合笔者多年在三峡库区的研究实践，将危岩稳定性研究现状概化为危岩形成机制、危岩稳定性计算方法、危岩稳定性评价方法、数值分析的应用等4个方面，系统梳理了每个方面的研究情况，发现国内外学者聚焦危岩体主控结构面端部裂纹平面扩展问题，对危岩体稳定性与变形特性的影响机制进行了深入系统的研究，但未考虑危岩空间形态的影响，缺乏对主控结构面四周贯通中部区域非贯通情形下的三维断裂稳定的研究。指出了危岩稳定性分析进一步研究中应高度聚焦的3个研究方向，即危岩体破坏的三维断裂表达、危岩体稳定性预测、危岩体稳定性监测预警技术。

关键词: 岩土工程, 危岩, 稳定性分析, 研究现状, 研究趋势

CLC Number:

P931.91

CHEN Hongkai, QIN Xin. Status Quo and Trend of Unstable Rock Stability Analysis[J]. Journal of Chongqing Jiaotong University(Natural Science), 2018, 37(10): 49-60.

陈洪凯，秦鑫. 危岩稳定性分析研究现状及趋势[J]. 重庆交通大学学报（自然科学版）, 2018, 37(10): 49-60.

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