1Research on water conductivity difference of subsided columns in north and south hydrogeological units in Huaibei Mining AreaWEI Da-yongQuestion Discussion1-52Discussion on classification standard of coal mining subsidence area in Sichuan ProvinceLI Yong-jinQuestion Discussion6-8,173Spatial distribution characteristics of close coal seam bifurcation and mergingZHANG JunQuestion Discussion9-11,174Research on reasonable arrangement and support technology of mining roadways in closed coal seamsCUI Shi-rongQuestion Discussion12-175Research on sensitive index and critical value of coal and gas outburst danger in Sanhekou MineZHANG QianQuestion Discussion18-21,276Analysis and control technology research on surrounding rock deformation of small pillar roadway in extra-thick coal seam in Shuonan Mining AreaHUANG Zhi-dongQuestion Discussion22-277Analysis and application of comprehensive geophysical prospecting technology in goafDING Yong-hongQuestion Discussion28-30,378Analysis on the characteristics of rock strata tending to collapse,migration and filling and optimization of coal mining technology in high-incline fully-mechanized caving faceREN Hong-jianQuestion Discussion31-33,379Analysis of flow field of artificial environment chamber in underground environment based on CFD numerical simulationMA ChiQuestion Discussion34-3710Numerical simulation and application of the floor evolution of flow field in Chengjiao Coal MineWANG Pei, LI Xin, ZHANG Jin-ling, DING Ya-heng, XU Zhi-minExperimental Study38-4311Research on the decompression effect of long-distance liberation seam mining in the upper part of extra thick coalWU Xue-song, MAI Qiao-li, YU Gui-liangExperimental Study44-4812Laboratory experiment research on water and sand burst for mining coal seam near thick loose layersLIU Yan-xin, WU Yu-liang, YAN Zeng-hui, WU Yu-shiExperimental Study49-52,5613Research and design of coordinated control system for fully-mechanized mining faceZHANG XingExperimental Study53-5614Study on failure mechanism and stability of structural fracture roadway under complex stress conditionsJI Jun-quan, YANG JingExperimental Study57-6115Top-coal stability characters of mining roadway in specially thick coal seamLIU Hai-quan, ZHU Jing, WANG JianExperimental Study62-6816Research on key technology of surface drainage for prevention and control of water disaster in high separated strata of mining overburdenLI Lian-gang, ZHAO Shi-long, QIAO WeiCoal Safety69-7717Evaluation of roadway support system under rockburst in Chenjiagou Coal MineCHEN Yan-feng, LI Xue-jun, LI Geng, WU Hong-binCoal Safety78-8218Application of combined grouting in prevention and control of floor water disaster in working faceJIANG Wen-haoCoal Safety83-8719Construction technology of a small coal bunker and its coal feeder chamberLYU Zhao-hai, ZHAO Chang-hong, HUANG Hai-peng, JIN Hua, YUE Xiao-jun, HU Xiao-long, JIN YA-junPractical Technology88-92,9620Study on gas control technology in directional branch long borehole areaLI Wei, ZHU Chuan-jie, LIU NaPractical Technology93-96 