1Discrimination and Determination Method for Safety Factor of First Rupture of Stope Immediate RoofTest Research1-52Establishment and Application of Theoretical Model for Coal Blowing from Holes in High-outburst SeamYAO Qian, LIN Bai-quan, MENG Fan-weiTest Research6-93Power Spectrum Characters of Microseism Induced by Fracture of Hard Roof StrataTest Research10-134Research on Seam Water Infusion Technology by High-pressure Pulse Water HammerTest Research14-16,195Experimental Study on Effect of Explosion Suppression Water Curtain for Coal Mine Gas ExplosionFAN Xiao-tao, LI Run-zhi, XUE Shao-qianTest Research17-196Model Experiment and Prediction on Water Conductivity of Fault Zone in Gujiao Mining AreaTest Research20-237Optimization of Bolt Supporting Parameters for Shallow-buried Easy-weathering GatewayApplication Techniques24-278Evaluation of Floor Water Inrush Risk Based on System Cluster MethodApplication Techniques28-309Research on Correlation of Internally-stagged Tailing Gate and Spontaneous Combustion in a Fully Mechanized Caving Face of Inflammable Gassy Seam with Large Mining Length and Double Tailing GateMEI Yong, YAO Cheng-linApplication Techniques31-32,3610Numerical Simulation Study and Control Analysis on Gas Migration Rule in Stope with Y-Shape Ventilation SystemApplication Techniques33-3611Principle of GPR for Detecting Loose Circle of Roadway Surrounding Rock and Its ApplicationApplication Techniques37-39,4212Research and Design of Monitoring Substation Based on P89LPC936ZHAO Jian-GuiApplication Techniques40-4213Prevention and Control of Rock Burst Based on Distribution Rule of Stress Field in Folded AreaCHEN Guo-xiang, SUN QiangApplication Techniques43-4514Analysis on Rational Depth of Floor Pressure-relief Slot in Large Cross-sectional Soft Rock ChamberYANG Zhan-biaoApplication Techniques46-4815Development and Application of a New Gas Drainage and Extraction Boring Device for Coal MinesZHANG Hai-junTechnical Experience49-50,5416Evaluation on Effect of Gas Predrainage from No.5916 Working Face in Longfeng Coal MineHUO Chun-xiuTechnical Experience51-5417Application of Truss Supporting Technology in Gob-side Entry of Soft Coal Seam with High Ground PressureLI Ai-ChangTechnical Experience55-56,5918Cause Analysis of Water Inrush from 21070 Working Face in Chaochuan No.1 MineZHAI Jia-wenTechnical Experience57-5919Analysis on Characters and Rules of Coal and Gas Dynamic Disaster in Huainan Coal Mining AreaZHANG Yong-jiangTechnical Experience60-6220Analysis and Control of Mine Water Filling Threatened by Complex Water DisasterTechnical Experience63-65 