1. State Key Laboratory of Coal Resources and Safe Mining, College of Geosciences and Surveying Engineering, China University of Mining and Technology, Beijing 100083, China
2. Department of Energy and Mineral Engineering, Geosciences, EMS Energy Institute and the G3 Center, Pennsylvania State University, University Park 16802, Pennsylvania, United States
3. Key Laboratory of Continental Shale Hydrocarbon Accumulation and Efficient Development, Ministry of Education, Northeast Petroleum University, Daqing 163318, Heilongjiang, China