1Research status and development trend of hydraulic support precision pushing and fast follow-up technologyREN Huaiwei, ZHANG Shuai, ZHANG Desheng, ZHOU Jie, REN Changzhong, MIAO Xing, LIU Ke, HOU WeiAcademic Column of Young Expert Committee1-9,152Research on blockchain mechanism of mine Internet of thingsZHANG Liya, LI Chenxin, LIU Bin, JIANG YufengAcademic Column of Young Expert Committee10-153Review of discharge theory and numerical research on intrinsically safe low voltage DC circuitsZHU Lin, LIU Shulin, LIU Boqing, JIANG ZhangheOverview16-254Research on path planning of parallel gangue selection robotHUANG Jinfeng, ZHANG Jianxi, YU Jiangtao, MIAO ShujiExperimental Research26-32,425Video object detection of the fully mechanized working face based on deep neural networkYANG Yi, FU Zefeng, GAO Youjin, CUI Kefei, WANG KepingExperimental Research33-426Retinex mine image enhancement algorithm based on TopHat weighted guided filteringHONG Yan, ZHU Danping, GONG PingshunExperimental Research43-497Coal and gangue image classification model based on improved feedback neural networkYAN HonglinExperimental Research50-55,1138Research on the deformation and failure depth of the floor in fully mechanized top coal caving of extra-thick seamHOU JunhuaExperimental Research56-61,1219Study on determination of development height of mining-induced fissure zone in deep outburst coal seamGUO Minggong, TAO Yunqi, ZHANG JianzhaoExperimental Research62-68,9110Analysis of rock burst risk of mining in hanging wall of normal and reverse faultsWEI Shiming, WANG Fuying, ZHANG Zesheng, JIN MengfanExperimental Research69-7511Method for extracting stressed rock crack based on light reflectivity mutationGAO Xiang, GAO YananExperimental Research76-8412Study on coal crack propagation and failure mode with different moisture content under uniaxial compressionLU Weiyong, LIU Qi, QU Lina, ZHANG HaijunExperimental Research85-9113Fault line selection method for coal mine power grid based on RCMDE and KFCMHAN Guoguo, SHI Xiaojun, WANG Hui, CHENG Weijian, MU YanxiangExperimental Research92-9914High-frequency isolated variable frequency speed regulation sensorless vector control in mineLIU Wenzhuang, LIU Jiangong, WANG Yiying, BO Lei, HAO YuhongExperimental Research100-10615Research on sorting reliability of cable-driven gangue sorting robot system based on fault treeQIAO Xinzhou, WU Chenchen, LIU Peng, FAN Hongwei, MAO QinghuaExperience Exchange107-11316Non-coal mine safety supervision mode based on risk monitoring and early warningJIANG Hongnian, CHEN Xiaolin, WANG Chao, HU Ran, ZHANG YuExperience Exchange114-12117Design of mine integrated dispatching management and control platformCHEN Huaying, DU Zhigang, SONG XingjiaExperience Exchange122-12618Research on key technologies of multi-element monitoring data integration in intelligent mineLI Guomin, ZHANG Ao, HE Yaoyi, GAO Wen, HUANG ZongliuExperience Exchange127-130,14619Research on surrounding rock failure law of large mining height working face in thick loose layer based on microseismic monitoringHENG Peiguo, ZHAI Changzhi, XIN Chongwei, WANG Yanlu, CHEN YangExperience Exchange131-13920Risk assessment of water inrush from coal seam floor based on comprehensive weightingZHENG JianyingExperience Exchange140-146 