1Pressure Drop Propagation Law in Vertical CBM Well Drainage and Mining ProcessPANG Tao, XIN Xin, SHEN KaiTest·Research1-42Experimental Study of Coalbed Methane Replacement by Injecting Carbon DioxideMA Li, XING Yuanyuan, WEI GaomingTest·Research5-83Drainage and Mining of Large Dip Angle Coal Seam U-shaped Horizontal WellQIN Yuxia, LIU Liangliang, ZHANG Jianghua, CHEN ZhaoyingTest·Research9-12,164Study on Adsorption Potential Difference of Different Destructive Types of CoalWANG Qiao, WANG ZhaofengTest·Research13-165Experimental Study on Pore Characteristics of Fenton Modified Coal Samples Based on Nuclear Magnetic ResonanceDUAN Xinjun, WEN ZhihuiTest·Research17-206Pore Structure of Soft and Hard Coal and Its Influence on Gas Desorption Characteristics Under Variable PressureTIAN Jing, LIN Xiaoying, SU Xianbo, SUN JiananTest·Research21-267Effect of Temperature on Magnetic Properties of Coal and RockZHANG Xinhai, QIN Zheng, LU Miaomiao, BAI ZujinTest·Research27-308Study on Key Parameters of Carbon Dioxide Fracturer During Energy DischargePENG RanTest·Research31-349Evaluation of Phreatic Water Abundance in Weathering Zone Covered by Eolian Sand Based on FAHP-GRAGUO Qichen, LI Wenping, GUO TaigangTest·Research35-4010Experimental Study on Flow and Heat Transfer of Ice Slurry in a Horizontal TubeBAI Yin, WANG Qi, WANG ChangbinTest·Research41-44,4911Failure Mechanism and Its Control of Thick Coal Seam Roof Above Large Span Open-off CutLAI Yonghui, XU Youzhang, GAO Xianglong, XIAO PengTest·Research45-4912Deformation Mechanism and Asymmetrical Control of Roadway with Soft and Broken Surrounding RockYU Yang, CHEN Yong, LIANG HuaqiangTest·Research50-5413Self-anchorage Theory for Full Thread Screw Bolt and Relevant Application Test in Coal Mine RoadwayZHANG Jiamian, ZHANG Nong, QIAN Deyu, AN YanpeiTest·Research55-5814Study on Mechanical Properties of CF80 High Strength Steel Fiber Shaft Lining ConcreteYANG Long, XU Jin, XUE WeipeiTest·Research59-6315"Sectional Gas Drainage" Technology in Goaf for High Level Borehole of Diameter VariationSU Weiwei, TIAN YeTechnology·Innovation64-67,7116Regional Control Technology for Gas Pre-drainage in Coal Seam by Directional Long BoreholeJIA Mingkui, LI Xuechen, GUO Yanfei, LI GuodongTechnology·Innovation68-7117Natural Fire Control Technology During Coal Face Retraction by Igneous Rock IntrusionTANG Hui, QU Bao, YANG Junmin, LI Jimin, TIAN BaizhengTechnology·Innovation72-7418Mechanism and Prevention Technology of Rock Burst in Deep Coal SeamGAO Xin, MIAO Dejun, SONG DachuanTechnology·Innovation75-7819Application of High Strength and High Pretension Anchor Network Support Technology in Deep Mine Roadway Along GobZHAI Wenli, WANG Qijie, LI Tao, LIANG Bo, MA Xuemin, XU DongkangTechnology·Innovation79-8220Video Monitoring of Gas Drainage Based on COFDM TechnologyZENG WeiDesign·Development83-85 