1Gas interception and drainage technology of very close coal seam groupXUE Jun-huaSpecial Manuscript1-72Research and analysis on improving recovery rate of fully-mechanized top coal caving mining in extra thick coal seamZHANG Ai-jieQuestion Discussion8-123Practice of reasonable coal pillar reservation and support technology in deep well large dip faceZOU Yong-deQuestion Discussion13-17,424Analysis of gas drainage in high level roadway of 15081 working faceWANG Yu-shengQuestion Discussion18-205Discussion on development and manufacturing trend of complete electrical equipmentLIU Xi-kuiQuestion Discussion21-23,326Simulation analysis and monitoring forecast of mining stress evolution in deep isolated faceTANG KunQuestion Discussion24-297Evaluation of uncertainty in measurement of alarm action value of methane gas detectorHAI Le-meng, YU Rui-hongQuestion Discussion30-328Study on mine strata pressure behavior law of paste-filling face above high pressurized water in Daizhuang MineLYU Xue-gang, LI Min, CAO Meng-xuanExperimental Study33-37,429Analysis and discussion on defect detection of rock-socked pile tipCHEN Chong, FAN Rong-xiaExperimental Study38-4210Optimization of mine water treatment systemLIU De-linExperimental Study43-4511Numerical calculation and analysis of surrounding rock deformation law of roadway excavation along goaf in gently inclined thick coal seamQIAO LiangExperimental Study46-5012Transformation scheme of 10 kV high voltage explosion-proof frequency conversion and permanent magnet direct drive technology on belt conveyorWANG Wen-zhouExperimental Study51-53,5813Experimental analysis on hydraulic cavitation technology of coal seam drilling on 3216 working face of Xinjing MineXU ZheExperimental Study54-5814Design of air conditioning cooling system for second level of Pan'er MineWANG ZhenExperimental Study59-6215Study on hydrogeological characteristics and water inrush risk of Baotashan sandstone aquiferGuan Yantai, Qiao WeiCoal Safety63-6916Control status and development trend of rockburst mechanism and prevention in ChinaCHEN Yan-feng, LI Xue-jun, WU Hong-bin, GONG Si-yuan, WANG Gui-fengCoal Safety70-7517Study on key technologies of mine geological water controlREN Hai-fengCoal Safety76-7818Application of water treatment technology for 2103 belt trough floor in Beixinyao Coal MineWEI Xiao-longCoal Safety79-81,8619Deep control scheme and measures for fire area of underground water pump house in mineCHENG PengCoal Safety82-8620Practice of pre-mining seimic wave CT detection of stress concentration area in 402104 working face of Hujiahe Coal MineSHI Xing-xing, JIAO Biao, ZHANG Ying, TIAN Xiao-bing, DONG Zhe, ZHANG Huai-zhongPractical Technology87-92 