1Contact Analysis of Brake Block for Hoist Wire Rope Sliding Protection DeviceWANG Qian, XING Xiaofang, LIN Jie, MENG ChuangDesign and Research1-42Design of Welding Fixture and Welding Process Analysis of CFETR Window CollarHU Yufeng, YIN Zhonghui, LIU Zhenfei, ZHOU Hehe, SONG TangDesign and Research5-83Design and Application of Long Distance Transmitter for Ethernet Electric SignalYAO ChaoxiuDesign and Research9-114Design of Gas Detection Sensor Based on LoRa Wireless Communication in Coal MineJIANG Yuan, LI Hu, ZHU Hongrui, YUAN LinghuaDesign and Research12-145Design of Intelligent Monitoring Substation in Coal MineCHAI ShangdongDesign and Research15-17,216Analysis of Transverse Vibration from Wire Rope in Winding Hoisting SystemMA Wenwen, WANG Yan, WANG GuoyingDesign and Research18-217Optimization Design of Intake and Exhaust Manifold for Explosion-Proof Diesel EngineFAN JiangpengDesign and Research22-258Magnetic Field Analysis of Permanent Magnetic Coupler Based on Ansoft MaxwellYANG Fan, LIU LuluDesign and Research26-289Design of Ground Centralized Automatic Liquid Supply System of EmulsionJI Jianbo, WANG Yong, XU PengpengDesign and Research29-3210Optimization Design of Double Telescopic Column Structure of Hydraulic SupportSHI ZhiliangDesign and Research33-3511Remote Dynamic Testing Technology of Bolt Drilling Vehicle Walking SystemKANG PengIssue Discussion36-3812Application of Switched Reluctance Speed Regulation System in Driving of Mining Shovel TruckYANG ZhiqiangIssue Discussion39-4113Welding Technology of High Strength Steel Q550D for Hydraulic Walking SupportYANG JieIssue Discussion42-44,4714Application of Gas Grade Identification in TunnelGAO Pengjie, DU YancaiIssue Discussion45-4715Application of Electromagnetic Brake on ShearerTIAN Pengtao, JIANG Shudong, ZHANG LiangIssue Discussion48-50,5316Pressurized Water Supply Method for Underground Pipelines in Coal MineLI Zhaozhong, MA Xianghui, ZHAO QinglongIssue Discussion51-5317Brief Analysis of Efficient and Rapid Driving System TechnologyYANG JieIssue Discussion54-55,5918Application Research of Power Electronic TransformerLI ZheIssue Discussion56-5919Control Method of Appearance Quality in Coal Mining Machinery MaintenanceLIU XiaoxiaIssue Discussion60-6220Fault Diagnosis of Insulator Flashover Polluted by Different Contaminants Based on Multiple Linear RegressionXU Yunzhi, FAN Yingying, YAO Yufei, SUN Hongwen, YANG YiIssue Discussion63-70 