1Gas Drainage Method for a Gob Based on Distribution of Fissure ZoneJI Zhanqiang, ZHAO Fajun, LIU MingjuTest·Research1-42Experiment Simulation of Coal Gas Desorption Laws and Main Control Factors ResearchLI Qi, ZHAO XinTest·Research5-73Shell Explosion Test for Flameproof Electrical Apparatus with Two Connected ChambersLIU KaihuaTest·Research8-10,144Gas Permeability Experiment for Raw Samples of Tectonic Coal Under the Condition of Negative PressureWANG Gongzhong, SUN GuangzhongTest·Research11-145Orthogonal Experiment Study on Preparation of Foam Sol LiquidZHOU Yan, FAN Bingqian, XI Zhilin, SUN Xutong, LI JingTest·Research15-176Research on Rockburst Prevention and Pressure Relief Scheme Optimization of Heading RoadwaySHEN Wei, DOU Linming, XU Feng, LI JingTest·Research18-20,247Experimental Study on Pneumatic Orifice Dust CollectorLI Haizhan, WANG Zhuliang, DU Min, WANG Hongyu, SHENG HuaxingTest·Research21-248Experimental Study on Optimization Ratio of Tailings Paste Backfill MaterialMA Guangzhi, MA Ling, ZHANG BaoliangTest·Research25-27,319Experimental Study on Weakening Hard Roof by Pre-splitting Blasting During Initial Mining at Fully-mechanized Caving FaceLI Chao, KANG Tianhe, ZHANG BinTest·Research28-3110Research on Ground Pre-grouting Single Liquid Cement Base Composite Grouting Material for L-boreholeLI FangTest·Research32-35,3911Study on Limit Recovery Ratio of Regional Island Coal Face in Coal MineYANG Weili, JIANG Fuxing, YANG PengTest·Research36-3912Stress Effect Evolution Law of Underlying Coal and Rock Seam During Upper Protective Layer MiningWU Jiahao, WANG Zhaofeng, WANG Liguo, CAO ChaoTest·Research40-4313Research on Difficult Caving Mechanism and Weakening Effect of High Toughness Coal SeamMA Wenqiang, WANG TongxuTest·Research44-4714Study on Distribution Laws of Coal Seam Stress After Hydraulic FlushingLI Jingguo, DAI Guanglong, WU Jingmin, LI Hu, LIU YongjiangTest·Research48-5115Simulation Modeling for Reasonable Thickness of Rock Burst Prevention Sealing Wall with Goaf Large Area Roof CavingGAO Shuangshuang, LI HaitaoTest·Research52-5516Study on Electromagnetic Radiation Laws from Coal Measures Rock with Precrack During Its FailureSONG Xiaoyan, LI ZhonghuiTest·Research56-5917Rock Bolting Based on Effective Anti-friction Ways of Thrust Ball BearingMENG Xianzhi, KANG Hongpu, LIN JianTest·Research60-6318Heat Transfer Characteristics Test of WK400 Air Cooler in Coal Mine Chilling UnitSUN ZhilinTest·Research64-6619Study on Relationship Between Coal and Rock Mineral Composition and Incidence of PneumoconiosisLI Bei, TAN Qiong, MA Li, LIU ShenglongTest·Research67-6920A Fine Detection Technology for the Best Extraction Layer in Mining Fissure ZoneWANG Zhanfeng, LI BoTechnology·Innovation70-72 