1Exploration of current development status and collaborative paths of coal mine mechanization and intelligence in new eraSHI Bao, HAN Haoliang, PANG Bo, BAO Ruoyu, LIU Yi, LUN JiayunQuestion Discussion1-62Instability mechanism and control of surrounding rock in composite roof working face under concentrated loadZHANG XueliangQuestion Discussion7-10,183Dynamic graph analysis of coal mine gas prevention and control development trends in China in recent yearsYE Qing, MA Lei, WANG Jian, ZHU Bingbing, WU Yiquan, WU Yongtao, SU YiQuestion Discussion11-184Transportation and distribution characteristics of dust produced by slurry spraying process in underground roadwaySONG Xiaolin, LI ShihangQuestion Discussion19-24,305Application of analytic hierarchy process and fuzzy mathematics comprehensive evaluation in mine geological environment quality evaluationZHANG Gong, JIAN KangQuestion Discussion25-306Prediction and analysis of No.12 coal seam thickness in the deep part of the southeast wing of the Kaiping synclineZHANG Hui, GE YaoQuestion Discussion31-35,407Zoning and application of grouting working face in separation layer of overlying rock on the inner side of stop mining lineGONG JianyuQuestion Discussion36-408Research on mechanism of floor heave occurrence and its control technology in thick coal seam comprehensive gob-side entry retainingHU Xiaohan, LIU Shangming, XIE Xiaoguang, SUN Yanqing, LIU SenhuQuestion Discussion41-489Monitoring and analysis of ground subsidence in Weishan County based on SBAS-InSAR technologyWANG Peng, ZHANG Chao, TIAN Xuejiang, ZHAO YueQuestion Discussion49-5410Research and implementation of variable frequency speed control strategy for endless rope winchLIU DongpingQuestion Discussion55-58,6211Application of permanent magnet direct-drive electric drum on belt conveyorSHEN GuangxuQuestion Discussion59-6212Localization integration and application of control system in intelligence of Guojiawan coal preparation plantSUN PengQuestion Discussion63-6713Design of large-section chamber supporting for underground powerhouse of pumped storage plant in coal bearing soft rock stratumZHANG Peiding, LI Fuqing, GUAN Zenglun, XU Guo'an, MIAO Mei, ZHANG Zhaowei, WU Min, ZHANG Kai, ZHANG Peng, LIU YongExperimental Study68-7414Law and intelligent prediction design of roof breaking instability of fully-mechanized mining face of thick coal seam in Xiegou Coal MineYANG Congxin, LIU ChangyouExperimental Study75-8315Numerical simulation analysis of mechanical properties of metal meshZHANG Qi, JI Dong, SUN Peng, FENG JianzhiExperimental Study84-8716Supporting design and parameter optimization of mining roadway in shallow buried coal seam working faceCHU Fengjiao, CHU Jutao, DONG Fei, WANG Mengcheng, ZHANG Zhongyuan, FAN Yuzhang, SUN LihuiExperimental Study88-92,9817Study on influencing factors of fine water mist inhibiting fire spread in roadwayHANG Jian, ZHENG Zekun, GUO XiaofengExperimental Study93-9818Optimization design of bolt supporting in coal roadway under rapid excavationDU Mengyuan, WANG PengExperimental Study99-10419Research on influence of deep coal seam mining width on stability of coal pillarsWU HanExperimental Study105-10820Research on damage law of surrounding rock of large drop faults and prevention and control of floor water inrush during roadway excavation in Xinyi Coal MineZHANG LeiCoal Safety109-116 