1Study on Theoretical Calculation and Numerical Simulation of Rational Sectional Pillar Size in Fully Mechanized Top Coal Caving Mining FaceFAN Yuan, LI De-lin, SONG Wen-boDesign and Technology1-32Prediction on Inactive Time of 50t Ultra Large Skip in Hulusu MineWANG Xu-dong, GUO Jun, HAN Yong-weiDesign and Technology8-103Design Study on Abandoned Freezing Pipes as Underground Pipe Heat Exchanger of Geothermal Heat Pump SystemNIU Yong-sheng, WANG Jian-xue, LIU Rui-binDesign and Technology11-13,164Structure Design of Screw-type Ladderway in Vertical ShaftSONG Li-ping, ZHENG Zhong-you, WANG Chang-you, HUA Zhao-wen, ZHANG ChaoDesign and Technology17-195Design and Technology of Anchor Enhanced Support for Mine Bolt and Shotcreting RoadwayZHAO De-fangConstruction Technology28-306Study on Combined Support Technology with Full Closed U Steel Type Arch Support and Bolt-Steel Mesh-ShotcretingLU Chang-long, FU Ju-genConstruction Technology33-357Study and Practices on Spontaneous Combustion Prevention and Control Technology of No.2134 Coal Remining Face in Beimafang MineYANG Bin, ZHAI Xiao-wei, YANG Hong-ge, CHENG BinProduction Technology47-498Layer Level Control Technology of Fully Mechanized Coal Mining Face Passing Through Fault and of Exposed Tail GatewayLIU Qiang, WEI Bing-xiang, YANG Xing-ting, WANG WeiProduction Technology50-529Study on Comprehensive Gas Prevention and Control Technology of Coal Mining Face in No.3 Seam of Songhe MineHAN Zhen-li, LI Xiao-hua, LI Chen-wuProduction Technology61-6310Study on Application of Hydraulic Powered Support with Suspended Chain Splicing Beam to Mining in Shallow Depth SeamSHAO Xiao-ping, SHI Jian-jun, SHI Ping-wuDiscussion on Research68-70,7411Study on Broken Law of Roof Above Coal Mining Face Under Influences of FaultZHEN Ya-bin, ZHAO Yu-cheng, WANG Zi-boDiscussion on Research71-7412Study on Subsidence Value of Aquifuge Occurred by Longwall Local Flexible Backfill Mining in Shallow Depth SeamZHANG Wen-zhong, HUANG Qing-xiang, LIU Su-huaDiscussion on Research75-7813Study on Numerical Simulation on Roof Movement Law of Fully Mechanized Coal Mining Face in Steep Inclined SeamWU Rui, MA Tian-yong, LIU Chang-you, JI Wang-pengDiscussion on Research79-8214Experimental Study on Swelling Deformation Law of Mining Seam in Dual Protective Seam of Seam GroupZHANG Shu-jin, LI Shao-quan, LI Shu-qing, XIE Qing-xueDiscussion on Research87-9015Study on Numerical Simulation of Crack Expansion by Hydraulic Fracturing in Low Permeability Reservoir Rock StrataMA Shou, CHEN Jia-liang, YANG Yong, YU Yong, JU Yang, YANG Yong-mingDiscussion on Research94-9716Discovery Study on Temperature Compensation Mathematics Model and Optimal Observation Distance of Remote Temperature Field in Coal Waste PileWANG Hai-juan, XIA Qing, HU Zhen-qi, XIAO WuDiscussion on Research98-10017Study on Floatation Experiment of Wide-range Particle Size Slime FloatatorWANG Hong-hao, YANG Run-quan, WANG Huai-faDiscussion on Research112-11518Design on Attached Type Multi Function Construction Platform of Boom Type RoadheaderZHANG Wei-jie, ZHAO Qi-feng, WANG Yu-huai, WU MiaoEquipment Technology122-124,12719Prediction on High Technical Skill Talent Demand of Coal Enterprises Based on Systematic DynamicsLI Jin-san, NING Yun-caiProject Management138-140,144 