Integration of automatic discontinuity identification and multi-scale hierarchical modeling for stability analysis of highly-jointed rock slopes

IF 7 1区 工程技术 Q1 ENGINEERING, GEOLOGICAL International Journal of Rock Mechanics and Mining Sciences Pub Date : 2024-11-11 DOI:10.1016/j.ijrmms.2024.105955
Ya-ping Wang , Jia-wen Zhou , Jun-lin Chen , Yu-chuan Yang , Fei Ye , Hai-bo Li
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Abstract

The geometric shape of the slope and the distribution characteristics of the complex fracture system significantly impact the stability of highly-jointed rock slopes. Constructing an accurate three-dimensional (3D) geological model is crucial for the 3D stability analysis of these slopes. However, the numerous minor discontinuities in rock slopes complicate model construction and reduce computational efficiency. This paper proposes a stability-analysis method for highly-jointed rock slopes that integrates automatic identification of real discontinuities with hierarchical modeling of 3D multi-scale fracture networks. Real discontinuity information was automatically extracted using a developed fuzzy k-means clustering algorithm, which calculated the number of dominant discontinuity sets and their spatial distribution laws. The Monte Carlo stochastic method was then employed to generate a complex 3D fracture-network system with statistical characteristics identical to those of the real discontinuities. The multi-scale fracture network was classified based on trace length. Given the numerous minor discontinuities that significantly impact computational efficiency, synthetic rock mass technology was utilized to determine the representative elementary volume with equivalent rock-mass characteristics to reasonably generalise the geological engineering model of rock slopes with complex fractures. In applying the slope-excavation stability analysis and evaluation to the Feishuiyan rock slope, the method achieved high automation in contactless scanning, efficient identification of discontinuity effects, accurate model calculations, and reliable stability analysis during the generalization of the geological engineering model. This method proved effective for stability analysis of highly-jointed rock-slope excavations, and is significant for engineering evaluation, as well as for disaster prevention and mitigation of complex rock slopes.
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集成不连续性自动识别和多尺度分层建模技术,用于高节理岩石斜坡稳定性分析
边坡的几何形状和复杂断裂系统的分布特征对高节理岩石边坡的稳定性有重大影响。构建精确的三维地质模型对这些边坡的三维稳定性分析至关重要。然而,岩石边坡中存在大量微小的不连续性,这使得模型的构建变得复杂,并降低了计算效率。本文提出了一种针对高节理岩质边坡的稳定性分析方法,该方法将真实不连续性的自动识别与三维多尺度断裂网络的分层建模相结合。利用开发的模糊 k-means 聚类算法自动提取真实不连续性信息,计算出主要不连续性集的数量及其空间分布规律。然后采用蒙特卡洛随机方法生成复杂的三维断裂网络系统,其统计特征与真实不连续面的统计特征相同。根据痕迹长度对多尺度断裂网络进行了分类。考虑到众多微小的不连续面会严重影响计算效率,因此采用了合成岩体技术来确定具有等效岩体特征的代表性基本体积,从而合理地概括了具有复杂断裂的岩石边坡地质工程模型。在对飞水岩边坡进行边坡开挖稳定性分析与评价时,该方法实现了非接触扫描的高度自动化、不连续效应的高效识别、模型计算的精确性以及地质工程模型归纳过程中稳定性分析的可靠性。事实证明,该方法对高节理岩质边坡开挖的稳定性分析非常有效,对复杂岩质边坡的工程评价和防灾减灾具有重要意义。
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来源期刊
CiteScore
14.00
自引率
5.60%
发文量
196
审稿时长
18 weeks
期刊介绍: The International Journal of Rock Mechanics and Mining Sciences focuses on original research, new developments, site measurements, and case studies within the fields of rock mechanics and rock engineering. Serving as an international platform, it showcases high-quality papers addressing rock mechanics and the application of its principles and techniques in mining and civil engineering projects situated on or within rock masses. These projects encompass a wide range, including slopes, open-pit mines, quarries, shafts, tunnels, caverns, underground mines, metro systems, dams, hydro-electric stations, geothermal energy, petroleum engineering, and radioactive waste disposal. The journal welcomes submissions on various topics, with particular interest in theoretical advancements, analytical and numerical methods, rock testing, site investigation, and case studies.
期刊最新文献
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