1Experimental Investigation on Pressure Falling Method Measuring the Borehole's Influence RadiusXU Dong-fang, WANG Zhao-fengTest and Research1-32Experimental Study on Influence of Surfactant on Gas Adsorption and Desorption Performance of CoalYANG Chun-hu, YAO Jian, TIAN Dong-mei, KANG Huai-yuTest and Research4-83Study on Absorption Capacity of Coal Based on Low-temperature Nitrogen Absorption and High- pressure AdsorptionLI Xu, ZHANG Xing-hua, CONG Xiu-zhi, YU TaoTest and Research9-114Technology of Dust Collecting and Controlling in Full-mechanized Excavation WorkfaceMA Heng, LIU Jian, LI WeiTechnology Experiences12-14,185New Bore Hole Sealing Technology Applied in Coal Bed Methane Pressure MeasurementWANG Yan-lin, YANG Sheng-qiang, XU QuanTechnology Experiences15-186Gas Comprehensive Controlling Technology in Full-mechanized Caving Face of Nanshan Coal MineZHANG Hai-yangTechnology Experiences19-207Comparison of Measurement Methods for Displacement of Air Compressor Using in Coal MineTIAN YeTechnology Experiences21-228Multi-hole Enclosed Gas Pre-drainage Technology in 5130 Mining Area Coal Roadway in NO.2 Well of Meihe Coal MineLIE Shuang-haiTechnology Experiences23-269Coal Seam Spontaneous Combustion Prevention Technology in Large Inclined Angle Full-mechanized FaceZHAO Yan-xiangTechnology Experiences27-2910Preparation and Properties Investigation of New Air-leak Sealant Used for Coal MiningTechnology Experiences30-3311Application of Grouting Sealing Water Outburst Point Technology Underground Coal MineSHAN Zhi-yongTechnology Experiences34-3612Comprehensive Building Technology of Diaphragm Wall for Concentration Water Bursting DriftJIANG Qin-mingTechnology Experiences37-3913Application of Vertical Compressible Tie-in to Shaft Lining in Huainan and Huaibei Mining AreaTechnology Experiences40-4214Supporting Technology in Soft Rock Roadway of Liuhai Coal MineTechnology Experiences43-4515Optimization Design of Width Ratio of Mined-out Strip to Pillar for Room and Pillar MiningTechnology Experiences46-4916Study on Collapse Columns Distribution Rules in No.2 of Liuqiao Coal Mine Based on GISTechnology Experiences50-5217Deformation Rules of Auxiliary Cutting Hole Drift of Gassy Soft Thick Coal Seam and Large Mining Height Full-mechanized Caving MiningTechnology Experiences53-55,5818Drift Temporary Supported Technology for Full-mechanized Excavated Quickly under Complex Geological ConditionsTIAN Zhi-jun, MA Li-qiangTechnology Experiences56-5819Underground Mine Personnel Position System Based on RFIDPENG Ji-shen, LI Ming-ming, HUO Li-minTechnology Experiences59-6120Application of Crystal Reports in Mine Safety Monitoring SystemWU Hai-tao, HUA Gang, LI Jia-jiaTechnology Experiences61-64 