Experimental study and numerical modeling of brittle fracture of carbonate rock under uniaxial compression |
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| Institution: | 1. School of Resource Safety Engineering, Central South University, Changsha, Hunan 410083, China;2. School of Civil Engineering, Hefei University of Technology, Hefei 230009, China;3. Work Safety Key Lab on Prevention and Control of Gas and Roof Disasters for Southern Coal Mines, Hunan Provincial Key Laboratory of Safe Mining Techniques of Coal Mines, Hunan University of Science and Technology, Xiangtan 411201, China;1. Natural Resources & Environmental Engineeting Department, University of Vigo, Spain;2. Department of Metallurgical and Mining Engineering, Universidad Católica del Norte, Chile;3. Swedish Nuclear Fuel and Waste Mangement Co, SKB, Stockholm, Sweden;1. School of Resources and Safety Engineering, Central South University, Changsha 410083, China;2. State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Xuzhou 221116, Jiangsu, China;3. School of Nuclear Resources Engineering, University of South China, Hengyang 421001, China;4. Power China Zhongnan Engineering Corporation Limited, Changsha 410014, Hunan, China;5. School of Highway, Chang''an University, Xi''an 710064, China;1. Guangxi Key Laboratory for the Relativistic Astrophysics, Guangxi Colleges and Universities, Key Laboratory of Novel Energy Materials, Guangxi University, Nanning 530004, China;2. Institute of Physics Science and Engineering Technology, Yulin Normal University, Yulin 537000, China;1. State Key Laboratory for Geomechanics and Deep Underground Engineering, School of Mechanics and Civil Engineering, China University of Mining and Technology, Xuzhou 221116, PR China;2. Deep Earth Energy Research Laboratory, Department of Civil Engineering, Monash University, Melbourne, VIC 3800, Australia |
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| Abstract: | The brittle carbonate rock taken from the Tarim Oilfield is tested in laboratory under uniaxial compression. The acoustic emission (AE) is used to monitor the microcracking activity in rock during the experiment. Moreover, the 3D tomograms of carbonate rock after uniaxial compression are obtained by using CT imaging technology, which indicates that microcracks mutually interconnect and eventually form macroscopic fractures after failure. The PFC2D is used to model the behavior of brittle rock including microcracks propagation. The stress–strain curve and cracks distribution in rock model are obtained from the PFC simulation. The numerical results agree with the experimental test well. |
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| Keywords: | Microcracks Uniaxial compression AE monitoring CT images PFC model |
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