Reinforcement of rock mass with cross-flaws using rock bolt |
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| Affiliation: | 1. School of Civil Engineering, Shandong University, Jinan, Shandong 250061, PR China;2. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, Hubei 430071, PR China;3. Research Center of Geotechnical and Structural Engineering, Shandong University, Jinan, Shandong 250061, PR China;4. Department of Civil Engineering and Lassonde Institute, University of Toronto, ON, Canada M5S 1A4;5. Shandong Urban Construction Vocational College, Jinan, Shandong 250014, PR China;6. Department of Energy and Mineral Engineering, G3 Center and Energy Institute, The Pennsylvania State University, University Park, PA 16802, USA;7. Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hong Kong Special Administrative Region;1. Department of Petroleum and Natural Gas Engineering, West Virginia University, Morgantown, WV 26506, USA;2. Research Institute of Petroleum Exploration and Development, PetroChina, Beijing 100083, China;1. The Key Laboratory of Safety for Geotechnical and Structural Engineering of Hubei Province, School of Civil Engineering, Wuhan University, Wuhan 430072, China;2. School of Civil and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China;1. School of Civil and Environmental Engineering, Nanyang Technological University, 639798, Singapore;2. School of Manufacturing Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, China;1. School of Civil Engineering, Shandong University, Jinan, Shandong, 250061, PR China;2. Research Center of Geotechnical and Structural Engineering, Shandong University, Jinan, Shandong, 250061, PR China;3. Shandong Urban Construction Vocational College, Jinan, Shandong, 250014, PR China |
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| Abstract: | Rock bolting is one of the most effective and economical means of rock mass reinforcement. Existing studies of rock bolt reinforcement are mostly focused on rock masses without flaw, with a single flaw, or with parallel flaws. However in rock masses, cracks or flaws usually exist in the form of cross-flaws. In order to understand the impact of cross-flaws on rock bolt reinforcement and to further explore the differences of bolt reinforcement between rock mass with cross-flaws and rock mass with a single flaw, reinforced analog specimens with cross-flaws and with a single flaw were tested under uniaxial compressive condition. The experimental results show that the uniaxial compressive strength of the reinforced rock mass with cross-flaws in this research is higher than that of reinforced rock mass with a single flaw. This observation can be explained by the difference in the failure modes of reinforced specimens: the reinforced rock masses with a single flaw fail due to the formation of a shear crack while reinforced rock masses with cross-flaws fail as a result of a tensile fracture or interaction between tensile fracture and shear fracture. |
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| Keywords: | Reinforcement Rock bolt Rock mass Cross-flaws |
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