1. School of Mines, China University of Mining & Technology, Xuzhou, Jiangsu, China
2. Jiangsu Engineering Laboratory of Mine Earthquake Monitoring and Prevention, University of Mining & Technology, Xuzhou, Jiangsu, China Xuzhou, China;
3. Xuzhou Wushuo Information Co., Ltd, Xuzhou, Jiangsu, China
4. School of Geological and Mining Engineering, Xinjiang University, Urumqi, China