1Research on Automatic Unloading System Based on Laser Radar MeasurementWU HuiDesign and Research1-6,102Design of Steering System for Integral Support Carrier in Coal MineWANG NaDesign and Research7-103Research on Shock Safety Test Device for Small Flow Safety ValveYANG YangDesign and Research11-144Design of Selective Leakage Protection Device for Mine Low-Voltage Power GridCAO JianwenDesign and Research15-185Application of Hydro Mechanical Transmission in Heavy Duty Shovel Vehicle with Dual-Power Source in Coal MineJI QiangDesign and Research19-226Design and Application of Quick Start System of Explosion-proof Mixer Truck for Coal MineMA YanweiDesign and Research23-257Simulation Analysis of Arc Discharge in Capacitance Intrinsically Safe Circuit Based on MatlabSHI Yaping, ZHANG Liping, WANG YimengDesign and Research26-298Design of Crank Type Load Lifting Mechanism for Low-profile Shovel TruckLIU ZhigengDesign and Research30-329Performance Evaluation of Rock Drilling Machine Based on Analytic Hierarchy Process-Fuzzy MathematicsGONG BinIssue Discussion33-35,3910Research Status and Development Trend of Powered Air-purifying RespiratorBAI XueIssue Discussion36-3911Research on Sampling Impact of Tape End Based on Distinct Element MethodWANG Yang-yangIssue Discussion40-4312A Maintenance Decision of Belt Conveyor Idler Based on Reliability Estimation and Condition Monitoring DataZHANG BaolongIssue Discussion44-47,5013Research on Test Method of Alternating Current Servo Cylinder SystemDONG RongbaoIssue Discussion48-5014Uncertainty Assessment of Rated Torque Measurement Results of Pneumatic Bolt Drilling RigLI YaowuIssue Discussion51-53,5615Improvement of Climbing Ability of Trackless Rubber Tyred Vehicle in Coal MineYAO ZhigongIssue Discussion54-5616Failure Analysis and Selection of O-Ring for Hydraulic Control Valve in Fully Mechanized Mining FaceSONG YanliangIssue Discussion57-59,6317Training and Drilling System for Safety Based on Virtual Simulation TechnologyLIU Xiaodan, ZHANG Dongxu, ZHAO Yingjun, SHI RuiIssue Discussion60-6318Research on Personnel Approaching Prevention System of Mining Support CarrierCHEN KouzhongTechnical Practice64-6719Design of Automatic Cable Winding Device for Double Arm Anchor Drill TruckQIU WeijianTechnical Practice68-7020Design of Coal Flow Cooperative Control System Based on Sensor Detection TechnologyKOU JinchengTechnical Practice71-74 