Funding for this research was provided by:
National Natural Science Foundation of China (51504257)
State Key Research Development Program of China (2016YFC0600704)
Fund of Yueqi Outstanding Scholars (2018B051616)
Open Fund of the State Key Laboratory of Coal Mine Disaster Dynamics and Control (2011DA105287- FW201604)
Article History
Received: 8 February 2020
Revised: 4 June 2020
Accepted: 30 July 2020
First Online: 20 August 2020
Compliance with ethical standards
:
: The authors declare no conflict of interest.