1. Ph.D. Professor, School of Highway, Chang'an Univ., Xi’an 710064, China.
2. Ph.D. Candidate, School of Highway, Chang'an Univ., Xi’an 710064, China.
3. Ph.D. Lecturer, State Key Laboratory for Geomechanics and Deep Underground Engineering, China Univ. of Mining and Technology, Xuzhou 221116, China; School of Highway, Chang'an Univ., Xi’an 710064, China (corresponding author). ORCID: .
4. M. A. Engineer, Machinery Industry Survey, Design and Research Institute Co., Ltd., Xi’an 710004, China; School of Highway, Chang'an Univ., Xi’an 710064, China.