1Study on Application of Face's Tunnel Perspective in the Forecast of Gas GeologySUN Si-qing, TANG You-yi, CHEN Jiang-feng1-32Gas Controlling Practice for Upper Corner of IX2335 Fully-mechanized Faces in Wangtaipu Coal MineLiu Li-zhou, ZHANG Yin-zhong, CUI Shu-jun4-53Applying CAM600 Making Nitrogen Technology to Control Spontaneous Fire Comprehensively in Full- mechanized Sublevel Caving FacesWANG Zhi-jian, WU Jian-ting6-84Technology of Three-phase Foam Inerting in Thin Surface Layer and Heavy Air-leakage Fire District9-115Preliminary Analysis for Spontaneous Fire Initiating Gas Explosion and PreventionGONG Chuan-jing, BAI Jin-he12-146Successful Practice of CO2 Extinguishing Technology in Tianzhu Coal MineZHAO Zhong, WANG Hai-dong, LIU Yong-jun15-177Application of KJ118 Long-distance Monitoring and Controlling System for Mine SubstationLIU Xiang-xi, CHEN Zi-chun, ZHANG Xiao-ming18-208Research and Development of New Type Dust-collection VentilatorYU Xiao-min20-229Construction Measures of Digging Pile Hole and Reinforcing Soft LayerLAN Juan23-2410Successful Application of Fissure Circle Theory in Large Fracture Surface Room ConstructionCHEN Dian-fu, CHEN Yi-dong25-2711Preliminary Discussion on Coal Column Size Determination of Board-and-stoop Mining in Flat-lying Coal SeamJIANG Ji-lian27-2912Determination of Rational Undermining Form of Gun-drilling Detonation in Hard TunnelZHANG De-qi, TIAN Hui-li30-3213Several New Research Development of Coal Mine Emergency Rescue TechnologyHU Jing-dong, LI Xue-lai, LIU Feng-ru33-3514Preliminary Probing into Lead Determining Technology of Coal Mine Gassy BeltYUAN Jun-wei, WANG Zhao-feng, JIA Dong-xu36-3815Preliminary Analysis for Geologic Character of Gas Rich District of 21 Coal Seam in Fangzhuang Coal MineLI Xiao-qing39-4116Simplifying Wind Speed Measure Methods with Velocity Field CoefficientLIU Dian-wu42-43,6017Research and Analysis for Moving Accident of Drag-flight Conveyer in Coal MineLI Qiang44-4618Safety Present-Situation Analysis for Coal Mine Explosion-Proof Electric Appliance and CountermeasuresWANG Hong-qing, LI Xiao-guang47-4819Safety Putting Analysis of Coal Mine Enterprise and CountermeasuresBAI Wen-yuan, ZHAO Yun-sheng49-5120Reasons of Enforcing the Law Difficult in Coal Mine Safety Supervision and CountermeasuresWANG Su-zhen, GAO Xing-hong, MIN Zhe-qian51-53 