1Unsteady-state Diffusion Characteristics Model of Gas in Coal and Experimental VerificationXU Chao, WANG Shuo, GUO Haijun, FU QiangTest·Research1-52Pore Size Characteristics of Gas Adsorption in Coal at Supercritical StateZENG Chunlin, YUE Gaowei, HUO Liupeng, WANG BinbinTest·Research6-93Experimental Study on Improving Coalbed Methane Recovery by Gas InjectionSHI Qiang, CHEN Junbin, HUANG Hai, XIONG Penghui, DENG Hao, WANG HanqingTest·Research10-134Sensitivity Analysis of Low Rank Coal Reservoir and Its Influence on Coalbed Methane DrainageQIAO KangTest·Research14-165Study on Pore Structure Characteristics of Limestone of Late Carboniferous Epoch Taiyuan Formation in Huainan Coalfield Based on Liquid Nitrogen Adsorption MethodLI JiangtaoTest·Research17-226Directional Fracturing Caused by Carbon DioxideLIU Quanbao, WANG Fei, YAN Jingjing, LIU Hongwei, GUO ChengchengTest·Research23-267Study on Creep Instability of Mining CoalGUO Junjie, ZHANG RuilinTest·Research27-308Oxidation Kinetic Analysis of the Same Group Coal Based on Programmed TemperatureZHANG Yanni, CHEN Long, DENG Jun, ZHAO Jingyu, WANG Kai, SONG JiajiaTest·Research31-34,399Phosphorus Inhibitors for Suppression of Coal Spontaneous CombustionHOU Xinran, WANG Fusheng, GUO Liwen, QIAO Jian, ZHAO XueqiTest·Research35-3910Experimental Study on Acoustic Emission Characteristics of Coal with Different Moisture ContentCHEN Chunjian, ZHAO Yaojiang, GUO Shengliang, ZHAO Liang, PAN YutingTest·Research40-42,4611Study on Impermeability of Top Strata of Fengfeng Formation in Wangpo Well FieldZHOU YangTest·Research43-4612Creep Instability of Isolated Coal Pillar Under Rock BurstSONG Yanfang, PAN Yishan, LI Zhonghua, YIN WanleiTest·Research47-5013Overburden Migration Law of Lower Stope in Cilinshan Mine Coal Seam GroupZHANG Hao, WU YongpingTest·Research51-5414Study on Stability of Surrounding Rock Under Combined Support of Adjacent RoadwaysWANG Zhiqiang, XU Chunhu, SUN Zhongwen, SU ZehuaTest·Research55-5815Test Study on Compression Performance of Continuously Graded Filling Rock of Reducible Self-adaptive Pier ColumnCUI Jingkun, GUO Lijun, SUN Shouxin, WANG Kai, YAN ZehongTest·Research59-6216Study on Optimization of Hole Sealing Depth Based on Stress-fissure Characters of Surrounding RockLIU XiaogangTest·Research63-6617Effect of Foam Content on Filling Characteristics of Fast Hardening Cement SolidificationMA Li, GAO Yu, XIANG Qi, WEI Gaoming, REN LifengTest·Research67-7018Stability Analysis and Parameters Optimization of an Open-pit SlopeGUAN Xiaoming, WANG Xuchun, NIE Qingke, ZHOU Huanzhu, YU YunlongTest·Research71-7419Study on Directional Drilling Extration Technology in High Position for Roof in GoafHAO GuangshengTechnology·Innovation75-7820Pressure Relief and Disaster Prevention Technology by Large Diameter Borehole in Fully Mechanized Caving FaceLIU Huabo, ZHAO Yixin, JIANG Yaodong, WANG HaoTechnology·Innovation79-82 