Funding for this research was provided by:
National Natural Science Foundation of China (51604101, 51704099, 51734007, 51774119, 51604092)
Doctoral Fund of Henan Polytechnic University (No. B2018-59)
State Key Laboratory Cultivation Base for Gas Geology and Gas Control (WS2017B06)
Open Research Fund Program of Hunan Province Key Laboratory of Safe Mining Techniques Of Coal Mine (201502)
Article History
Received: 11 May 2018
Accepted: 17 December 2018
First Online: 2 January 2019