1. School of Geoscience and Technology Southwest Petroleum University Chengdu China
2. State Key Laboratory of Geomechanics and Geotechnical Engineering Wuhan Institute of Rock and Soil Mechanics Chinese Academy of Sciences Wuhan China
3. School of Petroleum and Natural Gas Engineering Southwest Petroleum University Chengdu China
4. Shenyang Research Institute China Coal Technology & Engineering Group Corp. Shenyang China
5. State Key Laboratory of Coal Mine Safety Technology Shenyang China