1Research on key technologies for precise drilling and extraction of pressure relief gas in extra-thick coal seamsLIU JinhuQuestion Discussion1-62Combined application of integrated geophysical exploration in exploration of small mine roadwayWANG PeishengQuestion Discussion7-123Roadway supporting design based on surrounding rock deformation and failure mechanismYUAN Li, BAI Wei, FENG LeiQuestion Discussion13-19,244Analysis of physical and mechanical properties of coal and rock mass in Haichatan Coal Mine under different temperature changesLI Bo, WANG LongQuestion Discussion20-245Exploration of flue gas water extraction technologyYANG Jinbao, SONG Wei, CAI Youlin, QIN Shengjun, HUO XingjiaQuestion Discussion25-28,336Analysis of difficulties in survey and design work in geological disaster engineeringYANG Zhongqiang, SHEN YanQuestion Discussion29-337Research and application of intelligent aging detection line with storage systemXU Zheng, LU Yaqing, LI LongQuestion Discussion34-388Selection and application of"three machines"in Hetaoyu MineLI Xiaowei, LIU Cheng, LIU QiangQuestion Discussion39-429Experimental study of epoxy-polyurethane waterproof materials based on roadway expansion jointsYAN Dong, LI Xiaofei, LI Shimin, CHENG Shuai, ZHANG Lei, ZHAO JunExperimental Study43-50,5610Experimental study on combustion characteristics and application of conveyor belt in underground coal mineYIN YongExperimental Study51-5611Deformation control technology of roadway surrounding rock with active advance supporting of grouting anchor cableWU NingExperimental Study57-62,6612Functional testing and manned experiment of permanent refuge chamber in Lijiahao Coal MineHE HonghaoExperimental Study63-6613Numerical analysis and monitoring experimental research on mining subsidence law of fully-mechanized caving face with large-height miningZAHNG Wei, CHEN Zhiyuan, CHEN Yuanzhen, WANG Yapeng, YANG Guilin, YIN XinghanExperimental Study67-75,7914Study on recovery and utilization of waste heat from continuous drainage of boiler in coal-fired power plantZHANG Saijun, LYU HaipengExperimental Study76-7915Numerical simulation study on"three zones"of overlying rock in inclined coal seam working faceZHANG Kang, CHEN Liang, WANG ZhengshuaiExperimental Study80-8416Stress evolution law and microseismic analysis during mining of roadway cutting coal pillar working faceMA Quanlei, ZHOU Weiguo, YUAN Likun, BAO Yao, WU BoxuanCoal Safety85-88,9517Rapid identification method and its application of outburst danger in driving face based on gas emissionLI Maoling, ZHA Jian, YE GuoqingCoal Safety89-9518Research on technical transformation of large dip angle belt conveyor in coal mine main inclined shaftJIA HaiboCoal Safety96-100,10719Optimization of the size of coal pillars reserved for auxiliary transportation roadway protectionWANG Zhiqian, BAI Xiaojun, LI GuangzhuCoal Safety101-10720Analysis of factors affecting stable operation of carbon monoxide sensorsSI BingwenCoal Safety108-111 