1Study Progress on Disaster Mechanism and Monitoring in Deep Coal MinesHE Man-chao1-52Authorization Control of "Two Small" Equipments in Coal MinesPEI Li-rui, LU Qing-hua6-73Intelligentization of Underground Transformer Station Monitoring SystemMA Xin-hua, WEI Lian-yun8-9,434Study on Causes of Coal Mine Roof Fall by Way of Level AnalysisGUO Yin-ling, ZHANG Zhi-xiong10-115Study and Application of Debris Shields in Steep Work FacesLI Gui-ling, DAI Xue-dong12-136Girder-Mesh-Cable Anchor Technology in Fault Fracture Zone Coal Laneway of Deep MinesCHEN Xing-he13-157Study and Application of New Non-Pressure Visible Lock DoorLI Jia-kuan16-178Financial Centralization Management of Group CompaniesWANG Kai-hang19-219Technology of Making High Strength Structural Elements for Big Mining Height SupportsWANG Sen-quan, FANG Ming21-2310Accounting of Group Companies Based on Net EnvironmentZHANG Zhi-cheng23-2611Rules of Epidermal Deformation in Mountainous AreasHUANG Zhen-zhen, WU Kan, XU Jing26-2912Tax Related Operations of Stock Rights Investment by Coal EnterprisesZHU Yan-chun30-3113Geologic Features and Disaster Prevention for Industrial Square in Xinglong Mine32-3314System Design of Coal Mine Material Management NetworksZHANG Xin-xiang35-3815GAF Back-Up Safety Devices for Mine Ventilator Damper Limitation SwitchesDAI Xue-dong, LI Gui-ling44-4516Sealing Discarded Underground Wells in Dahuangshan MinePEI Dao-qi45-4617Application of Remote Control System in Coal Mine Monitoring Based on USBLI Yang, CHEN Jin-ying, CHEN Zhuo, SHANG Qin48-5018Technology of Laneway Bolt Support by Full Mechanization Caving in Ultra Thick SeamsLIU Bao-shen, ZHANG Zhi-jun, WANG Bao-song51-5319Improvement on Bolt Support in Steep Coal LanewaysLIU Yu-wen, CHEN Fu-dong55-5620Affects on Graphite Properties of Attrition and Abrasion by Soaking SbMA Kun57-59 