1. School of Civil Engineering and Architecture, Chongqing University of Science and Technology, Chongqing 401331, China
2. Chongqing Key Laboratory of Energy Engineering Mechanics & Disaster Prevention and Mitigation, Chongqing 401331, China
3. Key Laboratory of Well Stability and Fluid & Rock Mechanics in Oil and Gas Reservoir of Shaanxi Province, Xi’an Shiyou University, Xi’an 710065, China
4. Department of Civil and Environmental Engineering, North Dakota State University, Fargo 58108-6050, ND, USA
5. Chongqing Bureau of Geology and Minerals Exploration, Chongqing 401121, China