1Pre-set Coal Rejects Backfilled Zone to Replace Small Coal Pillars of Pillarless Mining TechnologyWANG Hong-sheng, ZHANG Dong-sheng, MA Li-qiang1-5,782Application of Pitching Diagonal Strike Longwall Sectional Mining Method to Steep Inclined Ultra Thin SeamLI Hao, HU Guo-zhong, WANG Hong-tu, YUAN Zhi-gang, FAN Xiao-gang6-8,343Access to Improve Production of Coal Mining Face with Flexible Hydraulic Powered Shield SupportsLI Jun-bin, DU Ji-Ping, LI Tao9-124Numerical Simulation Study and Mechanism Analysis on Backfill Material in Coal MineHU Bing-nan, LI Hong-yan13-165Study on Floor Heave Mechanism and Control Technology for Goaf-Side Gateway Driving Under Coal Pillars of Seam IslandLI Wen-feng, BAI Jian-biao, YI Xi-feng, HU Zhong-chao, SHI Jian-xin17-206Analysis on Floor Heave Cause and Formation Mechanism of Mine Roadway in Shaqu MineWU Hua-tai21-24,277Full Length Sealed Grouting Reinforcement Technology with Deep Boreholes for Fully Mechanized Longwall Mining Face Passed Through Syncline TectonicWAN Shi-wen25-278Research on Similar Material Simulation Test of Surrounding Rock Relationship for Hydraulic Powered Supports of Fully Mechanized Top Coal Caving Mining FaceHUANG Qing-guo, KONG Ling-hai28-319Underground Mine Coal Rejects Backfill Technique and Backfill Equipment Buildings of Conventional Coal Mining FaceCHEN Jie, ZHANG Wei-song, YAN Bin, DU Ji-ping32-3410Application of Bolt and Steel Mesh Support to Equipment Removing Gateway of Fully Mechanized Longwall Coal Mining FaceLI Yong-sheng, LIU Yan-chang35-36,7411New Progress of Support Technology for Soft Rock Roadway in Coal MineLI Dian-guo37-3912Key Technologies of Large Mine Building in Huainan Mining Area Under Complicated Strata ConditionTANG Yong-zhi, RONG Chuan-xin40-4413Experiment Research on Hidden Combustion Turned to Flame Combustion of LigniteWANG Wen-cai, WANG Rui-zhi, HE Yuan, ZHANG Peng45-47,5114Analysis on Pressure Released Scope of Low Side Wall After Coal Blasting Operation of Seam Gateway in Outburst SeamZHOU Song-yuan, XU Dong-fang, YANG Zan48-5115Analysis Content Affected to Seam Gas Pressure Measured with Indirect MethodZHAO Fa-jun, WEN Zhi-hui, LIU Ming-ju, WEI Jian-ping, CHEN Ming52-5416Research on Elimination of Outburst Danger in Coal Mining FaceWEI Feng-qing, ZHANG Xiang-yang, SHI Guang-shan, YAN Liu-qiang55-5717Spontaneous Combustion Prevention and Control Technology of Top Coal During Gateway Driving in Thick SeamGUO Peng-fei, CHEN Fan58-61,6418Discussion on Gradation Standard of Mine Ventilation Difficulty DegreeWANG Yong-an62-6419Comparison Study on Mine Products Safety Certification Management Systems at Home and AbroadYAO Yuan, WANG Lei, CHEN Jie, PENG Jun, WANG Shu-bo65-6820Optimization of Mnemonic Cutting Path for Coal Shearer Based on Corpuscular Group AlgorithmZHANG Li-li, TAN Chao, WANG Zhong-bin, MI Jin-peng, ZHU Wen-chuang69-71 