1Overview of time synchronization technology for underground coal mine IoTs perception layerYUAN Liang, CHEN ZhenpingSpecial of Safe, Intelligent and Precise Coal Mining1-8,152Research on intelligent mining in Madiliang Coal MineXU Rijie, YANG Ke, WU Jinsong, KAN LeiSpecial of Safe, Intelligent and Precise Coal Mining9-153Digital coal seam-based precision mining system for fully mechanized working faceLI Xu, WU Xuefei, TIAN Ye, DONG Bo, DANG EnhuiSpecial of Safe, Intelligent and Precise Coal Mining16-214Research on path planning algorithm of robot in coal mine based on membrane computingHUANG Yourui, LI Jing, HAN Tao, XU ShanyongSpecial of Safe, Intelligent and Precise Coal Mining22-295Research on uncalibrated visual servo control of mine intelligent inspection robotLI Jing, HUANG Yourui, HAN Tao, LAN Shihao, CHEN Hongmao, GAN FubaoSpecial of Safe, Intelligent and Precise Coal Mining30-396Attitude control of mine inspection unmanned helicopter based on cellular membrane computingXU Jiachang, HUANG Yourui, LI Hongjin, LIU Yu, HAN TaoSpecial of Safe, Intelligent and Precise Coal Mining40-44,527Research on trajectory planning algorithm of manipulator arm of coal mine rescue robotHAN Tao, LI Jing, HUANG Yourui, XU Shanyong, XU JiachangSpecial of Safe, Intelligent and Precise Coal Mining45-528Research on the predictive fault diagnosis of mine ventilator based on digital twin and probabilistic neural networkJING Haixiang, HUANG Yourui, XU Shanyong, TANG ChaoliSpecial of Safe, Intelligent and Precise Coal Mining53-609Conveyor belt damage detection method based on improved YOLOv4ZHOU Yujie, XU Shanyong, HUANG Yourui, TANG ChaoliSpecial of Safe, Intelligent and Precise Coal Mining61-6510Support state perception and data processing technology of hydraulic supportPANG YihuiSpecial of Safe, Intelligent and Precise Coal Mining66-7311Study on the fast fluid supply and return scheme of hydraulic support column in fully mechanized working faceZHOU Rulin, QIAO Zishi, MENG LingyuSpecial of Safe, Intelligent and Precise Coal Mining74-8012Research on the protection range of pressure-relief in the mining of upper protective layerQIN Ruxiang, YANG Ke, CHENG JianSpecial of Safe, Intelligent and Precise Coal Mining81-8713Analysis and prevention of impact damage in deep goaf roadway under dynamic and static loadTANG Jiebing, JU Wenjun, CHEN FabingSpecial of Safe, Intelligent and Precise Coal Mining88-94,13414Intelligent fully mechanized mining support technology and equipment for thin-medium-thick coal seamGAO Xicai, MA Tengfei, WANG Qi, LIU Shuai, ZHANG Xichen, FAN Kai, TANG Jianqiang, HU BinSpecial of Safe, Intelligent and Precise Coal Mining95-10015The technology of gob-side entry retaining supported by flexible formwork wall with roof cutting and pressure relief for composite roof in deep mineSHEN Binxue, ZHOU Hongfan, ZHU Lei, WU Yuyi, QIU Fengqi, WANG Guopu, GUO Lin, HUANG JianbinSpecial of Safe, Intelligent and Precise Coal Mining101-10616Research on coal and gangue detection algorithm based on improved YOLOv5s modelSHEN Ke, JI Liang, ZHANG Yuanhao, ZOU ShengColumn of Conception and Practice of Intelligent Mine Construction107-111,11817Test of roof interception directional drilling for close distance coal seam group gas control in Qidong Coal MineZHANG Chaoju, FANG Jun, YANG Yali, WANG Xian, YANG XiaojiExperimental Research112-11818Research on lightweight coal and gangue target detection methodDU Jingyi, SHI Zhimang, HAO Le, CHEN RuiExperimental Research119-12519Research on bearing residual life prediction method of coal mine machinery equipmentSUN YongxinExperimental Research126-13020Research on the influence of coal mine dust concentration on UWB ranging precisionDING Zhen, ZHANG YuchenExperimental Research131-134 