Funding for this research was provided by:
National Key Research and Development Program of China (2017YFB0504104)
National Natural Science Foundation of China (41661144037)
National Natural Science Foundation of China (41302276)
Scientific Research Project of Geological Research Institute for Coal Green Mining, Xi'an University of Science and Technology (MTy2019-22)
Article History
Received: 13 May 2020
Accepted: 5 March 2021
First Online: 15 March 2021