1Analogy Simulation Study on the Influence of Coal Mining on Unconsolidated Aquifer in the Area Covered by Thick LoessXU Shuyuan, ZHANG Yongbo, SHI Hong, CHEN JunfengTest Research1-52Experimental Study on the Effect of Temperature Effect on Coal Seam Gas Adsorption and DesorptionYAN Min, LONG Hang, BAI Yang, LIN HaifeiTest Research6-103Effect of Non-pillar Mining in Xing' an Coal Mine on Nitrogen Injection in GoafMA Jiao, DONG ZiwenTest Research11-17,224Experimental and Numerical Analysis of Damage Characteristic of Rock Mass under the Condition of Confining Pressure LoadingLUO Xinrong, YANG Huan, LI MengkunTest Research18-225Prediction Model of Temperature Variation based on Gas Desorption Experiment of Coal ParticleYANG Tao, NIE Baisheng, YE QiushengTest Research23-26,476A Model of Safety Monitoring and Early Warning for Coal Mine based on Ontology and Association RulesWANG Xiangqian, ZHU Jia, MENG Xiangrui, HE YerongDevelopment Design27-317Design of Real-time Positioning System for Underground Personnel by Using Piecewise Weighted Least SquaresMO Shupei, LI GuoliangDevelopment Design32-368Early-warning Index System of Coal and Gas Outburst based on Fault Tree AnalysisZHAO Xusheng, MA Guolong, QIAO Wei, NING XiaoliangApplication Techniques37-439Research on Tiangu Sealing Material and Sealing Technique for Gas Extraction BoreholeLI Shiyi, ZHANG Qingsong, LIU Biaoyi, ZHANG Shuang, TIAN Hengxin, YANG RenkaiApplication Techniques44-4710Law and Application of Permeability Improvement in Low Permeability Coal Seam due to CO2 Phase Transition CrackingWANG Zongming, HENG Xianwei, QIAN Guohui, JIANG Xinheng, CHEN TingquanApplication Techniques48-51,5611Applied Research of the Dust Removal Technology and Equipment for High Pressure External Spray in the Large Section Coal LaneSUN FengApplication Techniques52-5612Research and Application of Downward Ventilation Technology for Safe and Efficient Working Face with High Gas ContentCHEN Dianfu, SUN BingxingApplication Techniques57-60,6513Research and Application of Key Technology and Equipment for Dust Control in the Process of Coal CuttingMA Wei, ZHANG Qun, WU Guoyou, YANG JunleiApplication Techniques61-6514Study on Aquifer Hydraulic Connection based on Pumping Test of Coal Seam RoofPENG Tao, LONG Liangliang, LIU Kaixiang, WANG Shengquan, NIU Chao, LIU Yang, LIU HuiTechnical Experience66-69,7315Permeability Increasing Technology by Using Liquid CO2 Phase Transition Multi-Discharge Crack in Soft Thick Coal SeamGUO ShousongTechnical Experience70-7316Construction Technology of Water-retaining Wall after Water and Sand Bursting in the Aquifer of Coal Mine RoofLI DebinTechnical Experience74-77,8117Research and Practice on Standardized Drainage of Bedding Drilling Borehole in Yangquan Mining AreaJIANG WangangTechnical Experience78-8118Research Progress of Synchronized Testing Method for Permeability Parameters-porosity of Gassy CoalTIAN Weidong, ZHANG QunIssue Discussion and Review82-85,9119Study on Grading of Major Gas Hazard in Coal Mine Based on Z-numberZHANG Airan, LI Xiaoxia, YAO YouliIssue Discussion and Review86-9120Review of Theory and Technology Research on Prediction of Coal Spontaneous CombustionLIU Chen, XIE Jun, XIN LinIssue Discussion and Review92-95,99 