1Study on Roof-lifting and Floor-fall Technology in Fully Mechanized Top-coal Caving Passby Graben StructureZOU Guanghua, SHI Haoyu, TIAN Duo, XU Xiaofeng, YANG Yukun1-62Study on Abutment Pressure Distribution Law of Roadway Along Gob in Jining No. 3 Coal MineWANG Bo, GU Changwan, YAN Gang7-143Research on developmental height of'Two Belts' of the 28107 working face in Zhen Chengdi coal mineYANG Gaofeng, SUN Ze15-194The composite roof structure of surrounding rock instability analysis and support pattern optimizationLU Zhaohai, ZHAO Changhong, ZHANG Jinhong, CHANG Feng, HE Xiuchi, GUAN Peng, YUE Xiaojun20-275Study on Numerical Simulation of "three zones" in goaf of 2394 working face in Donghuantuo Coal MineWANG Yuhuai, YIN Yichao, SI Junhong28-326Study on "Three Zones" Division of Coal Spontaneous Combustion and Nitrogen Injection Effect in Goaf of Long Large Mining Height Working FaceYUAN Guangming, LIU Jianhui, HUANGYangquan, FENGMingwei33-407Experimental Study and Application of Gas Desorption in Main Coal Seam of Kailuan Mining AreaQI Ming, QI LiMing41-458Research on fire prevention technology for super long miningspace in Deep Cross-islandDONG Qi46-50,589Study on the extraction radius of the bedding borehole in Hui Shuting MineCHEN Xuexi, SUN Ruibang51-5810Modelling and simulation of seismic wave propagation based on BlenderLIANG Juan, ZHU Quanjie, ZHANG Zhen, ZHANG Erhui59-6611Application of Improved Grey Model in Safety Hidden Danger Prediction of Open-pit Coal MineLI Jing, ZHANG Ruixin, LI Zequan67-7212Karst development characteristics and water inrush risk assessment of the third-level South 2nd mining area in Fangezhuang MineTIAN Wuzi, LI Kai, YU Han, SUN Ze73-7913Study on Suitability of a Proposed Site Considering Coal Mine Goaf and KarstHUA Shuai, DI Kaiqiang, YIN Shangxian, PENG Rui, ZHU Quanjie, LI Jiegang, ZHANG Jinhuan, WANG Meng80-8714Analysis of Early Carboniferous Stratigraphic Characteristics and Sedimentary Environment in Mangya Town Haixi Prefecture Qinghai ProvinceFENG Dan, YANG Defang, SU Guifen88-9415The temperature control methods of micro injection molding machines based on PLCZHANG Xiaoqian, FAN Yimeng, WANG Junjie, YANG Xiaoxin, LIU Qiang, LI Donglin95-9916The application of Poisson' s curve method and three dimensional numerical method in the final settlement calculation of soft soil subgrade of expresswayWEI Delin100-10617The enlightenment of British and American public management discipline system to the development of colleges and universities of ChinaLI Bixiao, LI Zequan107-11318The history and present situation of safety engineering specialty settingWANG Pengfei, LIU Bin114-11819Exploration on DGMM Model for Integrated Safety and Health in WorkplacesREN Guoyou, KUANG Wenjing119-124 