1State Council on Further Strengthening the Work of Safety in Production1-42Application of Double-pipe Pressure Grouting Technology in Gas Pressure MeasurementWANG Fa-kai, JIANG Cheng-lin, GONG Yan-wei, HUANG Xin-ye5-93Design of Wireless Monitoring System of ShearerTAN Chao, ZHOU Xin, JI Xiao-gang9-124Design of Monitoring System for Workshop Environment Based on ZigBee12-145DTHZ-20 Intrinsically Safe Type Electromagnet for Unloading Valve Used in MineLI Xiao-jun, LONG Xian-jiang, ZHANG Qing-an15-186Research of Automatic Data Collection and Processing Method of Characteristic Experiment of Safety ValveCUI Shu-kai, SHA Bao-yin, ZHANG Yue19-217Research of Deformation Monitoring System for Slope Stability of Xinqiao PyriteHUANG Shi-xiu, HONG Tian-qiu, GAO Fei, ZHU Da-yong22-258Design of Quantitative Detection System of Broken Wire for Steel Rope Based on BP Neural NetworkTIAN Zhi-yong, TAN Ji-wen26-299Design of Digital Control System of Mine Hoist Based on Redundant PLC29-3110Centralized Lubrication System with Distributed Type Based on RS485 BusSU Bo, WANG Li32-3511Research of Routing Algorithm of Underground WSNSUN Zhen-wei, WANG Chun-yan36-4012Numerical Simulation Research of Fully Mechanized Coal Face of Thick Coal SeamZHANG Jin-shan, ZHANG Chun-li40-4313Research of Circuit of Voltage-modulated Driving and Phase-locked Amplifying of LaserGUO Qing-hua, HUANG Qiang, LU Yuan-xiang43-4714Design of Wireless Vibration Monitoring System of Equipments of Coal Preparation Plant Based on WSN48-5015Research of Framework of Walkthrough System of 3D Roadway Based on Engine-modeYANG Bo, LIU De-jian, WANG Yu-kun51-5316Research of Multi-step Forecasting for Short-term Wind SpeedMA Ying-kui54-5817Direct Torque Control System of Salient Pole Synchronous Motor with Stator Flux Observer Based on Recurrent Neural NetworkHUANG You-rui, HANG Jun59-6218Design of a Control Scheme of Fast Braking and Accurate Location for DC Brushless MotorWANG Kui-ying, WU Xin-hui, QIN Chang-hai62-6419Research of Sectioning Algorithm of 3D Geology Model Based on TetrahedronZHANG Wei-jun65-6720Design of Harmonic Monitoring System of Coal Mine Grid Based on Virtual InstrumentZHAO Si-jun, SHAN Lei67-70 