1Simulation Research on Influence of Coal Mine Gas Concentration Change on Its Liquefaction ProcessZHU Jing, CHEN Jinhua, YAO Chenglin, CAI Anning, XIAO ZhengTest Research1-4,92Test Study on Effect of Silicate Mineral Desiccant on Hygroscopicity and Explosion-suppression Performance of Powder SuppressantZHANG Hao, XUE Shaoqian, GAO Yue, WU BoTest Research5-93Test of Forced Gas Drainage Technology by Air Injection for Gas Replacement in Coal Roadway Driving of High Gassy and Outburst MineLIN Haifei, HUANG Meng, LI Zhiliang, LI Shugang, ZHAO PengxiangTest Research10-12,174Classification of Surrounding Rock Stability of Coal Roadways in Fenxi Coal Mining Area based on SPSS and ANNKONG Xiangsong, SHAN Renliang, XIAO Yuhang, BAI YaoTest Research13-175Study on Strata Behavior Regularity in First Mining Face Based on Similar Material SimulationYU Zhongming, SHU Shihai, WEI Zhongju, XIE Xiaoping, WANG Zhenghong, ZENG ZhenghuaTest Research18-20,246Study on Influence of Ejection Fluid Viscosity upon Ejection Coefficient of Hydraulic EjectorWU Liang, LIANG Aichun, LI Dingfu, WANG WeiliTest Research21-247Design of Liquefaction Scheme of Low-concentration Coal-bed Methane under Oxygen-containing Condition and Analysis on its SafetyXIAO LuDevelopment Design25-28,368Design and realization of Comprehensive Test System for Coal Oxidation by HeatingGUANGBUJIAFU Shanzhu, ZENG Qiang, NIE Jing, GUAN Weiming, JIN ShikuiDevelopment Design29-329Development of a New-type Electricity Generation System with Mine Ventilation Air Methane by Catalytic OxidationLAN Bo, KANG Jiandong, ZHANG diDevelopment Design33-3610Application of Foreground Extraction in Monitoring System of Mine Belt ConveyorSONG Chaoyang, CHEN Dongliang, XUE Ming, YANG JixingApplication Techniques37-40,4411Research on Combined Control System of Contiguous Outburst Coal Seam GroupCHENG JianshengApplication Techniques41-4412Research and Application of Support Techniques for Soft Schist Roadway in Deep MiningXU Futong, MOU Wenqiang, ZHANG Qiang, ZHANG JiuyuApplication Techniques45-4813Determination of Reasonable Coal Pillar Width for Roadway Driving along Gob in Soft Coal Seam with Hard Roof and Soft FloorSHI Yingnan, LIU HaifengApplication Techniques49-5214Application of Surface Well Gas Drainage in Mining-affected Area of Yuecheng MineFU JunhuiApplication Techniques53-55,6315Principle and Method for Gob Oxidation Center DeterminationLI ShangguoTechnical Experience56-5916Control Technology for Coal Spontaneous Combustion in Gobs Based on Air Leakage Determination and Coal Temperature MonitoringZHANG Jianye, CHEN Jushi, SUN XinTechnical Experience60-6317Application of Gob Gas Drainage Technology with L-type WellKE Changyou, WEN Junsan, LI Haigui, LIU YiTechnical Experience64-66,7018Failure Mechanism of Mining Roadway in Island Working Face and Fore Support Technology for Its EndDENG Kangyu, WU TengfeiTechnical Experience67-7019Study on Remaining Rule of Fault Waterproof Coal Pillar Based on Discrete Element MethodLIU Fayi, ZHANG YudongTechnical Experience71-73,7620Determination of Aquifer Location and Water Inflow in Mine with Drilling Liquid ResistivityKANG YuemingTechnical Experience74-76 