1The Inner Circulation Mechanism in Sinking Column Formation in Fengfeng Coal FieldWANG Tie-ji, LIU Tian-xin, WANG Yi1-42Application of The Optimum Discharge Procedure to Groundwater Hazard Control in The Work Face in Liuqiao CoalmineWEI Da-yong5-83The Reswarch of Numerical Simulation for the Movement and Deformation's Regula of the Earth's Surface With Old Goaf Under LoadsSUN Ya-jie, SUN Zhan-fa, ZHANG Yong-bo9-11,314On Decreasing the Dense of Dusts in Comprehensively Mining Work Face by Pouring Water into Coal BedsYU Zhi-jiang12-155New Main Ventilator Behavior Measurement in West Mine of Luling Coal MineWU Xiang-qiong16-196The Tashan ore ultra thick seam synthesis picks puts goes against the coal technology discussionTIAN Hui-yu20-247Prestressed pull-rod supporting's experimentZHAO Ding-fang25-268Study On Narrow Coal Pillar Width and Support Parameter of Coal Gates Close to Gob in Fully Mechanized Longwall Top Caving FaceFANG Liang-cai27-319The Measures of Controlling the Stress of the Top Roof of the Working Face of the "Three-soft" Coal BedXIAO Xue-feng32-3410The Research and Experiment of Changing the Stress Structure of Wall Rock through the Technology of Blow-up and Stress-discharging in Deep HolesZHOU Jin-cheng35-3811The Optimization of Gravity Separation in Qian Jia Ying Coal Preparation PlantTANG Hai-xiang, ZHANG Xiu-mei, GUO De, WANG Xu-liang, ZhANG Kai-yong39-4212Researches on the Influenle of Garbage Upon Security of Surrounding Ecology and Means of Garbage DisposalLIANG Ying-jun, SUN Qiang43-4613Study About Electrical Leakage Protection on Coal Preparation PlantQI Lian-chao, WANG Yi-fei47-5014Shallowly discussed how to change and control The voltage of Kailuan's electrical networkLI Guo-quan51-52,6615Analysis of the Power Factor Dynamic Compensates in Power SystemQIAO Zhan-jun53-5516Discussion on estimating method of Accident economic lossQIN Rong, PENG Dong-zhi56-5917Psychological Behaviors and Safety of Young RidersWANG Zhao-xian, NIE Lei, XIAO Gui-ping, YUAN Hong-wei60-6318Study and Practice on Application of Scene General Line Technology in Coal Mine Supervision SystemLIU Wen-qing64-6619The Research of Induction-Communication Mining Feedback Electricity State TransducerGAO Yong-qing, SHANG Dan67-7120A New Software Testing Process ModelCAO De-sheng, WANG Yan-xing72-74 