1Grouting Reinforcement Support Technology of Soft and Weak Coal Sides in Large Section RoadwayYANG Ren-shu, XUE Hua-jun, GUO Dong-ming, LI Tao-tao, HE Tian-yu, GAO Zong-ming1-42Study on Overburden Strata Movement Law in Coal Backfill Mining Face with Paste-Like MaterialSHI Yong-kui, HAO Jian, SHANG Ya-ping, SUN Ting-ting, ZHAN Xiao-yuan5-7,363Study on Mine Strata Behavior Law of Combined Mining in Ultra Contiguous SeamsJI Ping, ZHA Wen-hua, SONG Xin-long8-11,154Study on Rational Width of Sectional Coal Pillar Applied to Fully-Mechanized Top Coal Caving Mining Face in Ultra Thick SeamLAN Yi-wen12-155Research on Slippage Mechanism of Single Anchoring Device in Mine Small Diameter Pre-Stress AnchorCHU Xiao-wei, JU Wen-jun, WU Yong-zheng16-19,236Study on Combined Joist Support Technology of High Geostress GatewayLINGHU Jian-she, SHEN Chun-ming20-237Analysis on Effective Anchoring Bolt Length Detected with High Frequency Ultrasonic Guided WavePAN Li-ye, ZHANG Chang-suo, MA Jie-teng, WANG Yin-tao, LIU Ming24-26,318Development Trend and Technology of Coal Floor Grouting Reinforcement Drilling ConstructionDONG Chang-le, MU Pei-ying, LI Quan-xin, FANG Jun, ZHAO Jian-guo, HAO Yong-jin, ZHENG De-zhi27-319Study on Composite Wall Support Technology Applied to Gob-side Entry RetainingLI Shu-xia, JIANG Fu-xing, ZHU Quan-jie32-3610Principle and Practices on Surrounding Rock Control of Three Soft SeamSUN Sen, TANG Shao-an37-40,4411Danger Analysis and Prevention and Control Technology of Strata Pressure Bump Occurred in Coal Pillar Zone of Deep MineLIU Jin-hai, WEI Zun-yi, WEI Zhen-quan, SHEN Wei41-4412Sensitivity Analysis on Supporting Parameters of Pre-stressed Anchor with Anti-Slide Pile in Surface MineSUN Jia-shu45-47,9213Gas Content Prediction Based on Linear Double Exponential Smooth MethodHE Jun, LIU Lin-bing, TANG Yi-ju48-50,6114Gas Control Effect and Determination on Drainage Location of Directional High Level Long BoreholeLI Jie51-53,5715Influence of High-rank Coal Reservoir Sensitivity on Coalbed Methane Wells ProductionBAI Jian-ping54-5716High Efficient Gas Drainage Technology with Fast Full Length Screen Pipe for Borehole Protection in Soft SeamLIU Qing-quan, TONG Bi, FANG You-xiang, TU Qing-yi, GUO Shuai-fei58-6117Determination on Effective Influence Radius of Gas Drainage Through Borehole Based on One-dimensional Radial FlowLI Zi-wen, LIN Bai-quan, GUO Ming-gong, GAO Ya-bin62-6418Study on Coal Reservoir Features and Gas Distribution Law in Lu'an Mining AreaLI Yang, ZHANG Lang, SHU Long-yong, TANG Wen-jie65-6919Study on Pressure Released Gas Drainage Technology in Flat and Contiguous Seam Groups with Soft Seam,Soft Roof and Soft FloorTONG Xiang-yang, WEI Jin-rong, HE Xing, Chen Yi, CHENG Zheng-gang, XU Can-rong70-7420Gas Drainage Affected to Spontaneous Combustion Three Zones of Mining Goaf Under the Condition of Nitrogen InjectionWANG Wen-ge, YUAN Kui75-78,83 