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Multiscale hierarchical analysis of rock mass and prediction of its mechanical and hydraulic properties

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文摘 Engineering geological and hydro-geological characteristics of foundation rock and surrounding rock mass are the main factors that affect the stability of underground engineering. This paper presents the concept of multiscale hierarchical digital rock mass models to describe the rock mass, including its structures in different scales and corresponding scale dependence. Four scales including regional scale, engineering scale, laboratory scale and microscale are determined, and the corresponding scaledependent geological structures and their characterization methods are provided. Image analysis and processing method, geostatistics and Monte Carlo simulation technique are used to establish the multiscale hierarchical digital rock mass models, in which the main micro- and macro-structures of rock mass in different geological units and scales are reflected and connected. A computer code is developed for numerically analyzing the strength, fracture behavior and hydraulic conductivity of rock mass using the multiscale hierarchical digital models. Using the models and methods provided in this paper, the geological information of rock mass in different geological units and scales can be considered sufficiently, and the influence of downscale characteristics (such as meso-scale) on the upscale characteristics (such as engineering scale) can be calculated by considering the discrete geological structures in the downscale model as equivalent continuous media in the upscale model. Thus the mechanical and hydraulic properties of rock mass may be evaluated rationally and precisely. The multiscale hierarchical digital rock mass models and the corresponding methods proposed in this paper provide a unified and simple solution for determining the mechanical and hydraulic properties of rock mass in different scales.
来源 Journal of Rock Mechanics and Geotechnical Engineering ,2018,10(4):694-702 【核心库】
DOI 10.1016/j.jrmge.2018.04.003
关键词 Multiscale hierarchical digital rock mass ; models ; Numerical analysis ; Evaluation of rock mass quality
地址

1. Tsinghua University, State Key Laboratory of Hydroscience and Engineering, Beijing, 100084  

2. Institute of Mechanics, Chinese Academy of Sciences, Beijing, 100190  

3. Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, 100029

语种 英文
文献类型 研究性论文
ISSN 1674-7755
学科 建筑科学
基金 the Outstanding Youth Science Foundation of National Natural Science Foundation ;  the National Key Research and Development Plan ;  国家自然科学基金 ;  the Open Research Fund Program of the State Key Laboratory of Hydroscience and Engineering, Tsinghua University
文献收藏号 CSCD:6304301

参考文献 共 30 共2页

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