Funding for this research was provided by:
Guizhou University Talent Research Fund (2016-55)
National Natural Science Foundation of General Program ((No.51574244))
Key Laboratory of Safety and High-efficiency Coal Mining, Ministry of Education ((JYBSYS2017101))
Article History
Received: 6 December 2017
Accepted: 15 August 2019
First Online: 28 August 2019