1Present State and Development of China Artificial Ground Freezing TechnologyWANG Jianping, LIU Weimin, WANG Heng1-4,252Prevention and Control Technology of Second Water Disaster from Full Depth Ground Freezing of Mine Shaft in Weak Cemented Soft Rock StrataTIAN Le, FENG Xuhai, WANG Jianping5-83Study on Comparison and Selection of Water Prevention and Control Alternatives for Mine Shaft in Watery Dolostone of the Ultra Thick Dengying Formation in Southern Guizhou AreaCHENG Derong, LI De, YUAN Dongfeng, GAO Xiaogeng9-12,524Optimal Reconstruction of High Resistance and Network Complicated Mine Ventilation NetworkLI Gang, ZHANG Weiyong13-175Diameter Varied Construction Technology of Mine Shaft Outer Lining in Freezing Section of Ultra Deep Thick AlluviumZHANG Daohai, ZENG Peng, ZHANG Yan18-21,256Research and Development on Wireless Temperature Measuring System in Mine Shaft Lining ProcessingLIU Liangping22-257Experiment Study on Acoustic Emission Characteristics of Weak Cementation Sandstone under Effect of Periodical Disturbance StressSONG Zhaoyang, DING Zhenyu, TAN Jie, NING Fangbo26-30,608Deformation Monitoring and Cracking Control Technology of Mine Air Return Shaft LinerHOU Junhua, QIAN Ziwei, HU Dongxiang, GUO Wanli, ZHANG Dong31-34,609Study on Numerical Simulation of Three Spontaneous Combustion Zones in Goaf of No S.8401 Coal Mining Face in Yangquan No.1 MineHUANG Zhenyu, NI Jingfeng, TAO Hongfu35-3810Analysis on Abnormal Causes of Temperature Variation in Pebble Layer Freezing StrataZHANG Yan, ZHANG Bujun39-4311Calculation and Engineering Application of Drilling Pressure and Torque during Rock Breaking Process of Raise Boring MachineTANG Zheng, LONG Zhiyang, LIU Zhiqiang44-46,4312Mechanized Waste Discharging System Applied to Mine Rock Roadway HeadingZHANG Feng47-4913Application of Semi-automatic Belt Replacement Device to Belt ConveyorWU Zhijuan, DU Yifan50-5214Pipe Drawing Technology for Ground Freezing Engineering of End ShaftWEN Hanhong53-5515Pipe Jacking Construction of Water Drainage Pipe Line in Jinjiaqu Mine under Complicated EnvironmentCAI Kun, LYU Zhaohai, YUAN Zhenshan, ZHOU Yu, LI Deming56-60 