1Evaluation of Fire and Explosion Hazard and Development of Expert System Software1-32Brief Analysis on Treatment Technique for Gas Combustion Accident4-6,103Optimizing Ventilation System and Solving Difficult Gas Problem7-8,454Measurement of Mine Surface Air leakage Rate with Equivalent Method9-105Improvement of Full-automatic Water Draining Device Used in Mine Gas Drainage System11-12,206Modern Surveying Technique and Modern Mine Safety Monitoring System13-15,207Application of Drainage Roadway Located in Floor in Comprehensive Gas Control16-16,208Several Opinions about Evaluation of Non-outburst Mine (Seam)17-209Selection of Optimum Seam Location for High-located Drainage Roadway in Dawan Mine21-2210Application of Fire Extinguishing Technique with Gel in 493092 Working Face of Ximing Mine23-23,2611Mine Safety Monitoring and Safety of Power Supply24-24,2612Inquiring into Optimization of Underground Haulage Signal System25-2613Application of Descending Ventilation in Fully Mechanized Face during Withdrawal of Face Equipment27-27,2914Setting-up and Practice of Methane Monitoring Transducer in Coal Face with Blasting Mining28-2915Research on Prediction of Coal Mine Fire30-31,3316Integrated Control of Gas in 13123 Higher Slice Face32-3317Brief Analysis on Outburst Prevention in Drivage and Gas Control in Winning Area34-3518Water Drainage of 2031 Face in 21 District of Huopu Mine36-36,4019Doing Well Comprehensive Gas Control and Creating“Double-high” Mine37-38,4020Ventilation and Gas Management during District Rise Passing through Gob of Small Coal Pit39-40 