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Demonstration of spatial anisotropic deformation properties for jointed rock mass by an analytical deformation tensor
Institution:1. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China;2. Yangtze River Scientific Research Institute, Wuhan 430010, China;1. Missouri University of Science and Technology, Rolla, MO 65409-0660, USA;2. Chevron North America Exploration and Production, Houston, TX, USA;1. Université Grenoble Alpes/CNRS, UMR 5521 3SR, Grenoble, 38000, France;2. IMSRN, Parc Pré Millet – 680 Rue Aristide Bergès, Montbonnot, 38330, France;3. CSIRO Energy Flagship, Po Box 883, Pullenvale, QLD, 4069, Australia;4. GeoRessources Lab., Université de Lorraine, CNRS, CREGU, Vandoeuvre-lès-Nancy, 54500, France;1. Departamento de Engenharia Civil e Ambiental/FT – Universidade de Brasília, 70910-900 Brasília – DF, Brazil;2. Escola Politécnica – Universidade de São Paulo, Av. Prof. Luciano Gualberto, travessa 3 n° 380, 05508-010 – SP, Brazil;1. State Key Laboratory for Geomechanics & Deep Underground Engineering, China University of Mining and Technology, Xuzhou 221116, PR China;2. Shandong Provincial Key Laboratory of Civil Engineering Disaster Prevention and Mitigation, Shandong University of Science and Technology, Qingdao 266590, PR China;3. State Key Laboratory of Coastal & Offshore Engineering, Dalian University of Technology, Dalian 116024, PR China
Abstract:This paper develops a joint deformation tensor (JD), which considers all of the joint's mechanical and geometrical parameters that affect the deformability of the rock mass. The method based on JD (JD method) and an elastic deformation anisotropy index (EDAI) are deduced for estimating the spatial anisotropy deformation of a jointed rock mass. The numerical modeling and in situ true triaxial compressive experiments well verified the effectiveness of the EDAI and JD method for the rock mass containing one joint set, orthogonal joint sets or the rock mass containing any types of joint network with unity stiffness ratio.
Keywords:Joint deformation tensor  Jointed rock mass  Anisotropic property  Equivalent elastic parameters  Spatial deformation
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