| 1. Hunan Provincial Key Laboratory of Shale Gas Ｒesource Utilization，Hunan University of Science and Technology，Xiangtan
411201，Hunan，China;
2. School of Ｒesource Environment and Safety Engineering，Hunan University of Science and Technology，Xiangtan 411201，
Hunan，China;
3. School of Geosciences and Info-physics，Central South University，Changsha 410083，China;
4. School of Ｒesource Environment and Tourism，Hunan University of Arts and Science，Changde 415000，Hunan，China |