1Modified Design of Shearer Roller Based on Hydraulic Impact Cutting ToothZHANG Haidong, GUO Jingbo, ZHOU Qingxiang, ZHANG ChaoDesign and Research1-42Design of Vertical Disassembling and Installing Machine with Hydraulic Support Column in Coal MineLI Yihua, YUAN Jian, ZHAO Feifei, DENG Jiayi, REN Huan, TANG PeiDesign and Research5-7,183Optimization Design of Independent Cab for Battery Electric Locomotive in Coal MineQI HongDesign and Research8-11,184Development of A Stepping Type of Self Moving Equipment Train for Coal MineWANG FadaDesign and Research12-185Test on Cutting of False Coal Wall with Small Cutter Disc on Whole Section Rectangular Rapid RoadheaderHE Yong, CHEN Genlin, PENG JunDesign and Research19-246Design of High Voltage Explosion-Proof SVG Water Cooling DeviceJIANG Yuan, LI Hu, YUAN LinghuaDesign and Research25-27,347Design of Shearer Traction Speed Control System Based on Principal and Subordinate Function XD2D of Converter ACS880CHEN Peng, LI QingDesign and Research28-30,348Design of Line Protection Device in Coal Mine Power Supply System Based on CAN BusSANG HongqiDesign and Research31-349Frequency Domain Analysis of Full Loaded Mine Shipping RetarderKANG PengIssue Discussion35-37,4010Calculation on Thermal Balance of Walking System on Crawler-Type Equipment in Coal MineZUO GangyongIssue Discussion38-4011Research on Deep Carburizing Process of Steel 20CrMnMoZHANG Cheng, YANG Jie, KANG DongweiIssue Discussion41-43,4612Analysis of the Tooth Profile Angle Influence for Shearer Sprocket on Meshing StabilitySHI ChunxiangIssue Discussion44-4613Contact Load Distribution of Double Row Tapered Roller Bearings in High-Power Shearer Cutting SectionKAN JinbiaoIssue Discussion47-5114Conparatrve Analysis of Three Type of Automatic Protection Device for Mine Explosion-Proof Diesel EngineZHAO MinggangIssue Discussion52-54,5715Analysis of Electric Leakage Protection Technology in Coal MineWANG ZhijunIssue Discussion55-5716Starting Fault Analysis of Starter QJZ-630/1140 (660)-4ZHANG TianyuIssue Discussion58-60,6517Application of Industrial Robot Intelligent Laboratory System in Coal Preparation PlantSUN Yinzhong, HAN TairanIssue Discussion61-6518Application of Trackless Rubber Tyred Vehicle in Mine Auxiliary Transportation SystemLI ZhunianTechnical Practice66-6919Development of an Automatic Turning Arc-Shaped Coal Baffle MechanismZHAI YushengTechnical Practice70-7120Model Selection and Strength Checking of Hydraulic Support ZZ6400/22/45YIN Zhonghui, ZHOU Hehe, SONG Tang, HU YufengTechnical Practice72-73 