1Design of Selective and Fast-tripping Over-current Protection for Underground Coal Mine 6～10kV Electric NetworkDU Sheng-hua, WANG Tuo, ZOU You-ming, CHEN Shu-hong1-32Working Faces Gas Drainage Technology in Extraction InfancyFANG You-xiang, ZHANG Xiang, LI Zhong-hu4-63Evaluation of Gas Drainage Effect and Gas Resources in Baijigou Coal MineLI Xiang7-84Practice of Gas Drainage Technology in Tunlan Coal Mine9-105Analysis for Gas Emission Rules in Gassy Full-mechanized Driving Faces and TreatmentMA Qin-zhen11-136Comprehensive Controlling Gas Technology in W3410 Plough FacesXU Zhao-chun, LIU Jin-long, NI Chen-wu13-147Controlling and Treatment of Spontaneous Combustion Hidden Trouble during Suspension of Mining Work in Full-mechanized FacesHE Ji-chun15-168Technology Practice of Preventive Fire on Extraction Tunnel of Full - mechanized Sublevel Caving in Coal Seam Prone to Spontaneous Combustion17-189Application Practice of Straight Pressure Equalizing Technology of Auxiliary VentilatorWEI Wen-zhu19-2010Determining Distribution State of Faces Temperature and Humidity Source by Element Methods21-2311Analysis and Research on Water - outburst Disaster Geological Condition in NO.13 Coal Mine of Pingdingshan Mining GroupYU Hui-guang, GUO De-yong, FAN Jin-yu24-2712Application of Frequency Translation Technology in Mine Ventilation ManagementTIAN Jing-wu, MA Cong-lin27-2913Application of Anti-flaming Integrity Core Belt Instead of Steel Cable Core BeltLI Jian, SUN Fang-gang, HUANG Qing-xi30-3114Development of A New Type Device for Checking and Measureing Belt SlideXUE Jun-rong32-3415Influence of Coal Seam Mining to Water - outburst in BottomCHEN Gang, WANG Qiong, DU Fu-rong34-3616Corrsion Mechanism Analysis of ConcreteLIU Yi-fang, NING Bao-kuan37-3817Optic Fiber Methane Sensor for MineYIN Jian, LIU Jun-bo, LI Xue-1ai39-4118Probing into Relevant Issues of Carrying Out 《 Coal Mine Safety Rules》 Terms on Auxiliary Ventilation of Sublevel Caving and Driving FacesGUO Fan-jin42-4319Insisting on People Foremost and Strengthening Troops of Gas Checking - up BuildingYAO Ming-sheng44-4620Discussion on Construction of Coal Mine Safety Management Dimensionality Mode47-49 