College of Geology and Environment Xi’an University of Science&Technology Xi’an 710054 ChinaStations for Post-doctoral Research of Geological Resources and Geological Engineering Xi’an University of Science and Technology Xi’an 710054 China;
Key Laboratory of CBM Resources and Reservoir Formation Process Ministry of Education China University of Mining&Technology Xuzhou 221116 China;
College of Geology and Environment Xi’an University of Science&Technology Xi’an 710054 China;
Geotemperature; Gray sequence; Geothermal gradient; Heat damage; Coal; Coal bed methane;