1. College of Geology and Environment, Xi’an University of Science and Technology, Xi’an 710054, China
2. Shenmu Ningtiaota Coal Mining Co., Ltd., Shaanxi Coal and Chemical Industry Group Co., Ltd., Yulin 719300, China
3. No. 7 Oil Production Plant, Changqing Oilfield Company, PetroChina, Qingyang 745700, China
4. Changqing Oilfield Company, PetroChina, Xi’an 710021, China
5. Laboratory of Engineering Geology and Hydrogeology, Department of Geological Sciences, School of Mining and Metallurgical Engineering, National Technical University of Athens, 15780 Zografou, Greece