1Research on Fatalness Evaluation about Bolt Supporting of the Roof of Coal DriftZHU Yong-jian, MA Nian-jie, SHI Hao-yu, MIAO Chun-guang1-32Development of Computer Remote Monitor System for Slurry Ejection and Fire Fighting in Coal MineGAO Zheng-zhong, FENG Sen-lin, LIU Yu-xia4-63Appling Comprehensive Fire Prevention Technology to Prevent and Cure Spontaneous Combustion when Slicing in Thick SeamLI Jian-hong7-84Compilation of Resistance Testing Program Based on AutoCADNI Jing-feng, CHEN bo, LIU Jian9-105Influence of Adopting Nitrogen on O2 Concentration and "Three Zone" Width in Gob of Full-mechanized Sublevel Caving FacesMA Han-peng, WANG De-ming, HE Qi-lin11-136Practice of Appling Methane Drainage Technology to Control Gas Emission in this Coal Seam GobWANG Dong-sheng13-157Application of Double Tri-Special Purpose Power Source in Coal MineWEN Yong-yu, LI Guo-jun16-188Improvement of Slidingtype Air Door Linkage Device and Spread ApplicationGUO Sheng-yi18-199Achievement of KJF 2000 Automatic Upgrade SystemZHENG Que, ZENG Wei, ZHANG Liang20-2210Synthesized Security Simulation Information System of Coal ProductionZHU Hong, JIN Xue-song, WEI Yong-lu23-2611Application of Anchorage Cable Supporting Technology in Roadway with Coal Seam RoofYANG Jiu-yun27-2812Origin Analysis of Rockburst in Extra Thickness Coal Seam of Laohutai Coal Mine29-3113Ways of Improving Roof-coal Yield in Fully-Mechanized Sublevel Caving Faces and PracticeTAN Xi-wen31-3314Several Issues Should be Noticed when Designing and Constructing Soft Rock RoadwayLI Bo34-3615Probing into Lectotyping Rightly and Forming in Reason of Three-Machines in Fully-Mechanized Faces36-3816Reasons of Losing Detonator in Large Range when Blasting Works and CountermeasuresLI Guang-hui39-4117Probing into Application Feasibility of Coalbed Methane Inspissations Technology in Tiefa Mining AreaZHAO Shi-hua, CHEN Li-jie, WANG Shu-you41-4418Analyzing and Preventing Gas Exploding Accidents by FTA TechnologyXIAO Zhong-hua45-4819Examining of Methane, Inflammable Gas and Environment Character Underground in Coal MineLI Wen-feng49-5020Harmonics Pollution of AC Frequency Conversion System Against Safety Monitoring and Controlling System and Controlling Measures51-52 