1Study on Change Laws of Gas Explosion Limits Under Extremely High Temperature ConditionsXU Chunzhao, SI Rongjun, LI RunzhiTest·Research1-42Research on the Effect of Electrostatic Field on Gas Adsorption of Coal SamplesLEI Dongji, GUO XiaojieTest·Research5-83Influence Research of Granularity on Gas Diffusion Law of Long Flame CoalCHU Chaoliang, LIU Yanwei, NIU GuoliangTest·Research9-124Numerical Simulation of Gas Accumulation Area Characteristics in Top-coal Caving RegionLI Sen, HE Junlong, ZHAO Yichao, PAN Liqiang, LIU AngTest·Research13-15,195Study on Seepage Law for the Front of Gas Displacement by Coal Seam Water InjectionJIANG Nannan, JIN Longzhe, CHEN ShaojieTest·Research16-196Experimental Study on Influence of Particle Diameter on Initial Expansion Energy of Released GasXU Lehua, JIANG ChenglinTest·Research20-22,267Overlying Strata Deformation Law of High Concentration Cemented Filling Mining in Coal MineMAN Jianfeng, PENG Yanghao, KANG HongtaoTest·Research23-268Research on Coal Dust Explosion Characteristics Under Electrostatic IgnitionWANG Bin, LIU Qingming, WANG Jianping, LIU Libin, ZHANG YunmingTest·Research27-299Test on Aerosol Preparation for Coal Spontaneous Combustion Prevention and ControlDENG Jun, HU Anpeng, MA Li, DONG Guoqiang, ZHANG YingTest·Research30-3310Thermogravimetric Analysis Experiment on High Pressure Sealing Material of Oxygen RespiratorLIU Pu, XUN ZengxiaTest·Research34-3611Influence of Overburden Rock-soil Ratio on Mining Subsidence in Dabaodang Coal FieldLIU Yue, ZHANG LeiTest·Research37-3912Research on Effect of High Key Strata on Evolution Law of Pressure ArchYANG Zhenguo, LI TieTest·Research40-4313Effect of Rubber Powder on Properties of ShotcreteLI Xiaofan, GUAN Xuemao, ZHANG HaiboTest·Research44-46,4914Study on Index Weighting Coefficients of Bump Tendency and Bump Hazard of Coal BodyJIA YanwuTest·Research47-4915PM2.5 Dust Concentration Distribution Law of Open Pit Coal Mine During Perforation and TransportionBIAN MenglongTest·Research50-5316Instability Mechanism and Control Technology of Coal Wall Curved Slide at Fully Mechanized Caving Face with Large Mining HeightCAI Wei, YIN Shuaifeng, TIAN Duo, SHI HaoyuTest·Research54-5717Pre-splitting Blasting Control Technology for Rock with Free SurfaceLI WeipingTest·Research58-6118"Dredging-plugging-solidifying" Comprehensive Construction Technology for Rapid Uncovering Outburst Coal Seam in Vertical ShaftYAN Xinling, LIU GuangyiTechnology·Innovation62-6519Gas Control Technology for High Gas Fully Mechanized Working Face in Low Gas MineWANG Yueming, WANG Jinguang, WANG Haiyang, HUANG Xiao, YANG YafengTechnology·Innovation66-6920Quick Pressure-testing Technology in Deep and High Gas Pressure AreaZHOU Xinlong, LI Junjian, SHI Biming, JIA ZhanweiTechnology·Innovation70-72,76 