1. School of Mining Engineering and Geology, Xinjiang Institute of Engineering, Urumqi 830023, China
2. Key Laboratory of Xinjiang Coal Resources Green Mining, Ministry of Education, Xinjiang Institute of Engineering, Urumqi 830023, China
3. School of Earth Sciences and Engineering, Sun Yat-sen University, Zhuhai 519082, China
4. School of Civil Engineering, Xuchang University, No. 88 Bayi Rd., Xuchang 461000, China