1Analysis and Comparison of Dynamic Model for Multi Rope Friction Hoisting System in Vertical ShaftZHANG Anning, QIAN ZhuangzhuangDesign and Research1-42Development of New Type Bidirectional Height-Adjusting Ganged Valves for Thin Coal Seam ShearerLIU FengDesign and Research5-73Research on Crack Propagation Characteristics of Sprocket Root for Shearer Walking Wheel Based on FRANC3DYUN RuiguangDesign and Research8-10,134Design of Rotary Grinding Platform Device for Guiding Slithery Boots on ShearerDAI JianpingDesign and Research11-135Nonlinear Finite Element Analysis of Vehicle Body for Heavy Shovel Board Supporting TruckZHAO YuanDesign and Research14-196Transient Dynamic Response Analysis of Sprocket for Scraper Conveyor During Starting ProcessJIAO HongzhangDesign and Research20-22,267Design of Data Acquisition Module with DP CommunicationJIANG Yuan, LI Hu, ZHU Hongrui, YUAN LinghuaDesign and Research23-268Design of Power Supply Monitoring and Anti-Overstep Trip System in Underground Coal MineHAO Yafeng, SHEN HuichuDesign and Research27-299Design of Winding Test Device for Trailing Cable in Coal MineJIN XinDesign and Research30-3210Analysis of Insulator Leakage Current under Fog and Haze Conditions Based on Fractal TheoryXU Yunzhi, ZHENG Hongwei, ZHAO Kun, BIAN NingIssue Discussion33-3711Load Forecasting of Medium and Long Term Coal Mine Power System Based on Artificial Bee Colony AlgorithmCHEN ChaofengIssue Discussion38-41,4412Analysis of Reverse Voltage Suppression Method for DC Electromagnetic RelayLONG XianjiangIssue Discussion42-4413Study on Power Loss of Walking Crawler Equipment in Coal MineZUO GangyongIssue Discussion45-46,5114Research on Multi-Service Switching Processing and Unified Transmission Sub Station in Coal MineGUAN Binghuo, ZHANG PengIssue Discussion47-5115Research on Roller Bearing Temperature Control for Hoist wih 9 000 kW Inner Mounted MotorWANG LishengIssue Discussion52-5416Application Research on Automatic Detection and Automatic Analysis in Mineral Separation ProcessCHEN HaijianIssue Discussion55-5917Application of Explosion-Proof Reversing Alarm Device Based on Infrared Ranging PrincipleGUO Zhijun, XUE TingIssue Discussion60-6318Study on Technology of Cutting Frequency Conversion Speed Regulation for Tunnelling MachineQUAN YuyunTechnical Practice64-66,6919Thoughts on Strengthening Supervision and Management of Safety Sign for Mining Products in Metal and Nonmetallic Underground MinesSHI ZhiyuanTechnical Practice67-6920Application of Inverter SM150 in Main Shaft Hoist at Hongqing River Coal MineZHAO ChunleiTechnical Practice70-74,78 