1A Novel Model for Length of Countercurrent Smoke Layer in Horizontal Tunnel FireZHOU Yan569-5722Influencesive of Loading Directions on Compressive Strength of Frozen Silt with Layered StructuresLI Hai-peng, HUANG Jia-hui, ZHU Yuan-lin, YANG Wei-hao, SONG Lei573-5773Velocity Field Distribution of Flotation Fluid in the Sieved-Flotation ColumnLIU Jiong-tian, ZHANG Min, LIU Huan-bin, WANG Yong-tian, CHEN Jia-xiang578-5814Experimental Study on Free Radical Reaction of Coal Initiated by Ultraviolet LightWEI Ai-zhu, LI Zeng-hua, PAN Shang-kun, YANG Yong-liang582-5855Characteristics of Micropore-Inbuilt Form of Micromolecules in Coal and Their Solubilization RulesQIN Zhi-hong, HOU Cui-li, ZHANG Di, DING Shu-guang, SUN Hao, JIANG Chun586-5916Mechanism of Surface Coating of Fly Ash CenospheresYANG Yu-fen, GAI Guo-sheng, LIU Xiao-hua, CHEN Qing-ru592-5967Recognizing Empty Trains in Coalmine Surveillance ImagesSUN Ji-ping, CHEN Wei, WANG Fu-zeng, TANG Liang, MA Feng-ying, LI Chen597-6028Experimental Study of Smoke Movement in the Vertical ShaftZHU Jie, HUO Ran, FU Yong-sheng603-6089Statistical Damage Model of Red Sandstone with Effect of Water Ratio ConsideredHU Xin, HONG Bao-ning, MENG Yun-mei609-61310Physical Simulation Study on Railway Effect of Bolt in Discontinuous Rock MassJIA Ying-xuan, SONG Hong-wei, DUAN Yan-yan614-61711Research on Pre-Tensioned Bolts Reinforcing Roadway Roof in Joint Rock MassWANG Tong-xu, WANG Wen-bin, DU Ye, LIU Mei-ping, ZHAO Bin618-62112Preparation of PVA-Silk Composite Hydrogel and Its Performance EvaluationZHANG De-kun, GE Shi-rong, SHEN Yan-qiu, LIU Jin-long622-625,64613Study and Implementation of Wireless Sensor NetworksZHANG Zai-chen, YU Xu-tao, BI Guang-guo626-62914Surface Properties of Macerals from Shenfu CoalDUAN Xu-qin, WANG Zu-ne, SUN Chun-bao630-63515Effect of Coal Pore Structure on the CO ProliferationGUO Li-wen, XIAO Cang-yan, LIU Yong-xin636-64016Computation and Analysis of Ultra High Molecular Weight Polyethylene Gear Based on ViscoelasticityZHENG Xiao-wen, LU Song, MENG Hui-rong641-64617Variations of Micro-Pore Structure and Chemical Composition of the Fractionally-Extracted Longkou LigniteZHANG Xiao-dong, QIN Yong, SANG Shu-xun647-65218Tribological Properties and Self-Healing Action of Nano Magnetic Particles MnZnFe2O4FENG Xue-jun, YANG Zhi-yi653-65719Correcting Method and Error Analysis for Sample Area in Direct Shear TestXU Zhi-wei, ZHOU Guo-qing, LIU Zhi-qiang, ZHOU Jin-sheng, TIAN Qiu-hong658-66220Study of Reclaimed Soil Respiration on the Sites by Filling Mining Wastes and Fly Ash into Subsidence Area Due to Coal MiningMU Shou-guo, DONG Ji-hong, WANG Hui, ZHAO Hua, BIAN Zheng-fu663-668 