1Study on Optimization of Highly -located Boreholes in the 714 Working Face of Qinan Coal MineCHEN Qi-wei, LI Zeng-hua, YANG Yong-Hang, ZHAO Chang-chuang, MA Xin-qing, WANG Ya-li, YANG Yu-jing, PENG Ying-jianTest and Research1-42Numerical Simulation of Roof Water for Double Aquifer Longwall MiningGAO Peng-jie, DENG Guang-zheTest and Research5-73Research on Law of Surface Movement for Mutil -coal Seam Strip Mining Influenced by FaultsWEI Hao, DENG Ka-zhongTest and Research8-124Study on Concrete-filled Steel Tube Support Subjected to Radial PressureGU Shuan-cheng, LIU Hao-dongTest and Research12-155Experimental Research on Repairing Broken Shaft Lining by Double Pressure -release Troughs MethodCAI Hai-bing, CHENG-Hua, YAO Zhi-shu, RONG Chuan-xinTest and Research16-196Technology of Aiea Outhurst Prevention for Single Coal SeamGUO Feng-xianTechnology Experiences20-227Technology of Inorganic Source CO2 Outburst Prevention in Steep Special Thick Coal SeamJIANG Li-min, WANG Jun-de, LI WeiTechnology Experiences23-268Improvement of Water Bosh "Three Prevention" DeviceLI Jie, YIN De-yin, TANG Gan-minTechnology Experiences27-299Advanced Pressure Relief Gas Extraction in Low Permeability Working Seam of Kaiyuan Coat MineTechnology Experiences30-3310Application of Sub-roadway in Construction of Uncovering Coal SeamGUAN Zhan-ming, CAI Cheng-gongTechnology Experiences33-3511Prediction for Content of CO Released Because of Losing Coal Spontaneous Combustion in Fop-coal Falling Region Based on GM(1.1) ModelTechnology Experiences36-3812Monitoring and Prevention for Coal Seam Spontaneous Combustion Danger near Open-cut offZHU Yan-liTechnology Experiences39-4013Application of Comprehensive Fire Fighting Technology in Spontaneous Combustion Prevention in Full-mechanized Caving FaceLI Rong-qiang, LIU Cheng-yuTechnology Experiences41-4414Treatment of Fracture Air Leak in Process of Back MiningTechnology Experiences45-4715Applying Water Manometer to Monitor Mine Ventilation Running StatusTONG Xiao-zhangTechnology Experiences48-5016Early Preventing and Controlling Compositive Techniques about Coal Spontaneous Combustion in Exceeding Long Fully-mechanized Caving FaceTechnology Experiences51-5217Determination of Cob "Three Zones" in 1302 Isolated Island Fully-mechanized Caving Face in Yunhe Coal MineQIN Qing-juTechnology Experiences53-5518Numerical Simulation of Stress Field Distribution Characteristics for Evolution of Coal Seam Fold StructureFU Jing-binTechnology Experiences56-5919Monitoring and Control of Roadway Surrounding Rock under Loose AquiferTechnology Experiences60-6220Application of Bolt-net and Grouting Technology underground Daxing Coal MineGUAN Hong-feng, XU Zhong-junTechnology Experiences63-65 