College of Geoscience and Surveying Engineering China University of Mining and Technology Beijing Beijing 100083 China;
College of Geoscience and Surveying Engineering China University of Mining and Technology Beijing Beijing 100083 China;
China National Administration of Coal Geology Beijing 100039 China;
Xi’an University of Science and Technology Xi’an 710054 China;
China National Administration of Coal Geology Beijing 100039 China;
College of Geoscience and Surveying Engineering China University of Mining and Technology Beijing Beijing 100083 China;
College of Geoscience and Surveying Engineering China University of Mining and Technology Beijing Beijing 100083 China;
Sichuan Coalfield Geology Bureau Chengdu 610072 China;
Strategic Research Center of Oil and Gas Resources Ministry of Land and Resources Beijing 100034 China;
China.; Middle; Carboniferous;