Funding for this research was provided by:
National Natural Science Foundation of China (51904013)
Open Research Fund of State Key Laboratory of Coal Resources and Safe Mining (SKLCRSM20KF003)
Youth Science and Technology Talents Support Program (RCTJ202005)
Article History
Received: 19 July 2020
Accepted: 13 October 2020
First Online: 21 October 2020
Compliance with Ethical Standards
:
: The authors declare that they have no conflict of interest.