1Experimental Study on Effective Survival Time of Methane Oxidizing Bacteria Groups in Coal Samples Containing GasWANG Qianzhi, ZHANG Jiale, PEI Yanyu, WANG Xiaoyao, YANG XiaobinTest·Research1-42Experimental Study on Rapid Determination of Non-desorption Gas Content at Atmospheric PressureLEI HongyanTest·Research5-8,123Effect Analysis of Barrier Layer Thickness on Outburst Delay Time Based on Combination ModelXU Lehua, JIANG Haina, FENG ZengchaoTest·Research9-124Study on Regional Automatic Powder Spraying Fire Extinguishing and Explosion Suppression System in Underground Coal MineCHANG LinTest·Research13-155Experimental Study on Mark Gas of Spontaneous Combustion in No.11 Coal Seam of Baozigou MineREN JiangpengTest·Research16-18,236Experimental Study on Controlling Coal Mine Fire by Ternary Copolymerized Super Absorbent Gel of BENT/AM/AAWANG Xiaofeng, WANG Junfeng, TANG YiboTest·Research19-237Experiment Study on Mark Gas of Coal Spontaneous Combustion Based on Programmed Temperature ProgramYANG Shuo, DAI Guanglong, TANG MingyunTest·Research24-27,338Research on Boundary Position Optimization for Very Close Vertical Distance Cross-mining Face and Surrounding Rock Stability of Floor RoadwayGUO Jing, SONG Yaobin, ZHAO Liding, MA LiyunTest·Research28-339Research on Original Stress Distribution of Floor Aquifuge Based on Anelastic Strain Recovery MethodXU FengTest·Research34-3810Field Test and Mechanism Exploration of a New Hole Sealing Technology with Recycling ResidueXIAO Wu, DAI Zhixu, LYU Youchang, GAO MingzhongTest·Research39-4211Study on Stability Control of End Face Roof of Fully Mechanized Caving FaceMU Xiuchao, ZHANG Baisheng, YANG Yongkang, WANG Xianan, JIN Libo, KANG LixunTest·Research43-4712Study on Treatment of Hydrogen Sulfide by Sectional Water Injection in Fully Mechanized Mining FaceLIU KuiTechnology·Innovation48-5113Combustion and Explosion Prevention Technology with CO2 and N2 in GoafZHANG Yansong, DU Wenzhou, WANG Yilei, MENG XiangbaoTechnology·Innovation52-54,6114Research on Fire Prevention and Extinguishing in Widespread Closed Goaf of Wangtai Coal MineYANG Hongwei, QIAN ZhiliangTechnology·Innovation55-5815Fire Preventing and Extinguishing Technology of Fully Mechanized Caving Face in Kouquan Coal MineZHANG JieTechnology·Innovation58-6116Technology of Ventilation and Fire Control in Multi-seam Mining AreaRAO Zi, XIE XianmingTechnology·Innovation62-6517Research Progress on Water-preserving Mining in Yushenfu Mining AreaSUN Xueyang, LIU Ziqiang, LI Cheng, MIAO LintianTechnology·Innovation66-7018Application of Pressure Relief by Roof Cutting in Gob-side Entry Retaining in Tangshangou Coal MineZHAO Bin, ZHOU Chuanyong, QIAN XuTechnology·Innovation71-7419Mine-used Portable Laser Methane Detection Alarm DeviceZENG WeiDesign·Development75-7720Mine-used Cable Inspection Scheme for Intrinsically Safety Electrical ApparatusWANG DongDesign·Development78-81 