2Analysis and Evaluation of the Stability About the GOB of the Coalmine Whichis Under the Dakaozi Slope of the Niangniang Mountain Henan ProvinceDiscussion on Research58-61
3Study on the Law of Fractured Full-mechanized Cavingnfining in Huainan CoalDiscussion on Research74-76
4Analysis and assessment on quality and fertility of soil at surface mine dumping siteDiscussion on Research77-79
5The Research Based on Water Pump Flow Control and Frequency Conversion Velocitymodulation Technology Application ResearchDiscussion on Research83-84
7Analysis on typical circulated economy mode of State-owned large coal enterprisesDiscussion on Research94-96