1Study of Coal and Gas Outburst Energy1-3,92Research on Emission Regulation of Hydrogen, Helium and Methane in Coal and Rock4-63Roof Structural Model of Underground Coal Gasifier and Its Influence upon Gasification Process7-94Numerical Analysis of Stability of Ventilation System10-11,225Radon Emanation and Its Control during Underground Mining12-13,166Research on Generation Condition of Reverse Smoke Flow During Fire in Entry14-167Research on Moment Feature Extraction of Grey Image of Partial Discharge in Electrical Equipment17-18,318Research of Reforming Micro-weather Environment in Chinese Last Home19-209Research on Improving Sensitivity of Methane Carrier Catalytic Sensor21-2210Present State and Development Trend of Gas Drainage and Utilization from Abandoned Mine23-2611Brief Discussion of High Mining-height Longwall Mining Techniques in China Coal Mines27-2912Probing into Generation Law and Control Method of Coal and Gas Dynamic Phenomenon in "Three-soft" Unstable Coal Seam30-3113Practice and Approach to Coal Wining in Gangway Retained for next Sublevel of Fully Mechanized Caving Face32-34,4114Recent Discussion on Form Coefficient of Mine Workings Cross-section35-36,4115Theory and Practice of Using Coal-field Borehole Logging to Distinguish Tectonic Coal in Qidong Coal Mine37-38,4616Application of Combined Gas Drainage Technology in Rujigou Coal Mine39-4117Research and Application of Bolting Technique in Coal Roadway along Gob and Bottom42-43,4918Application and Evaluation of CAD in Coal Mine Mapping44-4619Application of Underground Gas Drainage Pump Station in Sihe Mine47-47,5520Flue Dust Collection and Flue Gas Desulfurization Technique for Coal-fired Boiler and Its application48-49 