Numerical simulation study of the failure evolution process and failure mode of surrounding rock in deep soft rock roadways |
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| Affiliation: | 1. State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, Xuzhou 221116, China;2. Shandong Provincial Key Laboratory of Depositional Mineralization & Sedimentary Minerals, Shangdong University of Science and Technology, Qingdao 266590, China;1. Central Institute of Mining and Fuel Research (under CSIR), Dhanbad 826015, India;2. Indian School of Mines, Dhanbad 826004, India;1. School of Mines, Key Laboratory of Deep Coal Resource Mining, Ministry of Education of China, China University of Mining and Technology, Xuzhou 221116, China;2. School of Civil, Mining and Environmental Engineering, University of Wollongong, Wollongong, NSW 2522, Australia;3. Mining Consultant (Underground Coal), Wollongong, NSW 2522, Australia;1. School of Mines, Key Laboratory of Deep Coal Resource Mining, Ministry of Education, China University of Mining & Technology, Xuzhou 221116, China;2. Huaibei Coal Mining Limited Company, Huaibei 235000, China;3. Huaibei Pingyuan Soft Rock Engineering Company, Huaibei 235000, China;1. School of Water Resources and Environment, China University of Geosciences, Beijing 100083, China;2. School of Civil Engineering and Architecture, Beijing Jiaotoug University, Beijing 100044, China;1. State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining & Technology, Xuzhou 221116, China;2. Department of Mining Engineering & Metallurgical Engineering, Western Australian School of Mines, Curtin University, Kalgoorlie 6430, Australia;3. School of Mechanics and Civil Engineering, China University of Mining & Technology, Xuzhou 221116, China;1. State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining & Technology, Xuzhou 221116, China;2. Shandong Provincial Key Laboratory of Depositional Mineralization & Sedimentary Minerals, Shangdong University of Science & Technology, Qingdao 266590, China |
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| Abstract: | ![]()
Based on the safety coefficient method,which assigns rock failure criteria to calculate the rock mass unit,the safety coefficient contour of surrounding rock is plotted to judge the distribution form of the fractured zone in the roadway.This will provide the basis numerical simulation to calculate the surrounding rock fractured zone in a roadway.Using the single factor and multi-factor orthogonal test method,the evolution law of roadway surrounding rock displacements,plastic zone and stress distribution under different conditions is studied.It reveals the roadway surrounding rock burst evolution process,and obtains five kinds of failure modes in deep soft rock roadway.Using the fuzzy mathematics clustering analysis method,the deep soft surrounding rock failure model in Zhujixi mine can be classified and patterns recognized.Compared to the identification results and the results detected by geological radar of surrounding rock loose circle,the reliability of the results of the pattern recognition is verified and lays the foundations for the support design of deep soft rock roadways. |
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| Keywords: | Deep soft rock roadway Evolutionary process Failure model Numerical simulation Model recognition |
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