Funding for this research was provided by:
the Natural Science Foundation of Jiangsu Province (BK20160433)
the National Natural Science Fund of China (11502229)
the Opening Fund of Key Laboratory of Safety and High-efficiency Coal Mining, Ministry of Education (JYBSYS2019207)
the Program of Yellow Sea Elite in Yancheng Institute of Technology (2019)
the Program of Outstanding Young Scholars in Yancheng Institute of Technology (2014)
the Program of Yellow Sea Team in Yancheng Institute of Technology (2019)
Article History
Received: 30 June 2020
Accepted: 25 December 2020
First Online: 6 January 2021
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: The authors declare that they have no code.