1Study on Material Impact Stability of Loading Section of Gangue Photoelectric Separation ConveyorYANG Jian, WANG Huanping, JIANG Qingnan, ZHANG Wei, LI FeiDesign and Research1-42Realization of Camera Angle Calculation and Analysis Software on Fully-mechanized Mining FaceREN Wei, LIU Shuai, HUANG QianDesign and Research5-83Development of Ground Layout Conveying System in TBM Backup Continuous Conveying SystemQI ChuangangDesign and Research9-124Simulation and Test on Safety Protection Device of Mine DrivingYANG Zheng, XIE Yongli, LI Zhanhai, DING Yuan, LI Mengjie, LI MaoqingDesign and Research13-175Research and Development of High-voltage Flameproof and Intrinsically Safe Frequency Conversion Adjustable-Speed Integrated Machine Used in MineMI Zien, XUE Chao, QI Yazhou, ZHU GengchaoDesign and Research18-236Design of A Height Adjustment System for Thin Seam Coal Winning MachineXUE JunDesign and Research24-277Research on Coal Mechanized Sampling System Based on PLCHU Zhiwei, HAO WeiDesign and Research28-318Key Technologies of Fire Prevention and Control System for Heavy Mine TruckCHEN Guangtai, LIU Zhengyuan, YANG Baozhu, LI Zheng, LU Mengyu, CHEN ChuangIssue Discussion32-369Research on Test Method of Unloading Impact Pressure of Hydraulic Support Check ValveYANG JianxinIssue Discussion37-4010Fault Diagnosis Method of Diesel Engine Valve Lash Based on Relative Spectrum Energy Moment and Probabilistic Neural NetworkZHU Ji'an, LIU YiIssue Discussion41-4511Research on Coal and Rock Movement Pattern of Large Mining Height Fully Mechanized Caving Face in Extra-Thick Coal SeamREN GuojunIssue Discussion46-49,5412Multi-motor Power Balance Control Strategy of Permanent Magnet Synchronous Direct Drive Belt ConveyorHUANG HaifeiIssue Discussion50-5413Application of Chain Static Var Generator in Scraper Conveyor of Coal MineLIANG YuIssue Discussion55-5914Improved Design of Flameproof Electrical Enclosure Based on SolidWorksHU WenfangTechnical Practice60-6315Online Monitoring System of Mine Bolt GroupKONG LingchengTechnical Practice64-66,6916Analysis on Mechanical Characteristics of Drag Chain of Scraper Conveyor in Coal MineZHANG XueruiTechnical Practice67-6917"Curve" Survey and Repair of Planetary Gear Carrier in Dispatching WinchZHANG ZhiweiTechnical Practice70-73,7718Application of Right Angle Turntable Integrated Conveyor in Fully Mechanized Mining FaceZHANG LijunTechnical Practice74-7719Design of A New Type of Cantilever Roadheader Side SupportLI HongliangTechnical Practice78-80 