1Experimental Study on Tip Diameters and Punching Angles of High Pressure Water JetCHEN Jian, GUO Liwen, WU Jianguo, GUAN Lianhe, LI FengzhiTest·Research1-52Experimental Analysis of Flow Field Characteristics Based on Three-dimensional ModelYU Zhaoyang, YANG Shengqiang, HU XinchengTest·Research6-93Research on Gas Distribution for Exposed Empty Lane at Heading Face as Residual Coal Repeated MiningJIANG Donghai, WANG Tongxu, MA WenqiangTest·Research10-134Research on Laws of Initial Gas Emission Flow from BoreholeTIAN Shixiang, JIANG Chenglin, XU Lehua, TANG Jun, CHEN Yujia, LI Xiaowei, ZHANG QiangTest·Research14-17,215An Experimental Study on Impact of Soaking Time on Low Temperature Oxidation Characteristics of CoalMA Bucai, CHEN Youqiang, YANG Yinlei, XU Shimin, ZHU YingTest·Research18-216Numerical Analysis of Air-breathing Law in High Temperature Loose Coal Containing Heat SourceXU Yuequn, WU JinxiangTest·Research22-25,297Experiment Study on Spontaneous Combustion of Coal Under Different Gas Adsorption PressureLIU JingTest·Research26-298Experimental Study on Mine Coal Dust Particle Size and Concentration Real-time Online Monitoring SystemWEI Mingsheng, TONG Minming, LIANG Liang, WANG HuaruiTest·Research30-339Research on New Gel Composite Materials to Prevent Spontaneous Combustion of Residual CoalZHOU Peiling, ZHANG Yinghua, HUANG Zhi'an, GAO YukunTest·Research34-3710Analog Simulation Experiment Research on Coal Fire Spread Law in Outcrop Fire AreaWANG Wencai, WANG XinzhouTest·Research38-4011Experimental Research on Factors of Permeability for New Solid Gas Coupling Similar MaterialLIU Jun, ZHAO Pengxiang, WU Zhongcheng, ZHENG SanlongTest·Research41-4412Numerical Simulation on Height of Water Flowing Fractured Zone Development in Overlying Rocks Under Hard Roof Coal Seam Group MiningHU Hao, NING Jianguo, WANG Jun, LI Guangbo, SHI XinshuaiTest·Research45-4813Evaluation of Water Abundance of Loose Layer and Classification of Water Body Mining LevelCHEN Jiangfeng, XIONG Fazheng, LI Meng, HAN Yinhang, WU HongtaoTest·Research49-51,5614Experimental Study on Coalmine Boreholes Shrinkage Crossing Expansive Mudstone Under Drilling Fluid SoakingHOU Jifeng, LIU Hao, LI Yongming, ZHAO LijuanTest·Research52-5615Experimental Study on Controlling Hydrogen Sulphide Gushing by Spraying Absorption Liquid During Coal Caving SupportZHANG GeTest·Research57-60,6516Comparison Study on Different Elastic Impedance Response Characteristics for Tectonic CoalLIU Zhihuai, LIU Wen, LIU NaTest·Research61-6517Tests on Pillar Failure Width Under One-sided Backfilling ModeGUO Junting, CHEN Shichao, LIU JiboTest·Research66-68,7218Safety Property Study on Polymer-based Reinforcement Materials for Coal and Rock MassWANG Jiyong, YU Weiyu, CHEN Yang, MA Lei, SHAN Tixia, GUO JianmingTest·Research69-7219Study on Strata Bearing Structure and Surface Deformation of Strip-filling MiningSUN Guangzhong, JING Yongbin, WANG Gongzhong, XU XingTest·Research73-7620Study on Power Coordination and Load Balance Control of Scraper ConveyorZHOU Shuying, ZENG Yibo, ZHOU Juan, YU Yuesen, ZUO GuanfangTest·Research77-80 