1Study of factors influencing the gap between backfill hydraulic support and roofZHANG Qiang, ZHANG Jixiong, TAI Yang, JIA Hongxian, LI Meng757-7642Determination of the roof caving heights of thick and extra thick coal seamsWU Fengfeng, YANG Jingxuan, YU Bin, CHEN Xianhui765-7723Observation of marble with single pre-existing crack using high-speed photography under loading and unloading conditionsSONG Yanqi, LI Ming, WANG Xiao, LI Xiaorui, FU Xiaolong773-7814Degradation of methane under vacuum ultraviolet and its kinetic analysisWEI Jianping, LIU Wen, YANG Juan, DAI Jun782-7885Study of shortest sealing depth with considering plastic softening and dilatancyHAO Fuchang, SUN Lijuan, LIU Mingju789-793,8076Influence of additives on the fire suppression performance of water mistSUN Zhihao, JIANG Juncheng, ZHAN Wang, JIA Litao, ZHU Shunbing794-7997Study of the time-varying mechanical performance of reinforced concrete (RC) columns under to small eccentric loading in coal mining industry environmentFANG Zhongnian, LYU Henglin, WU Yuanzhou, ZHAO Chengming, LIU Kuang, MA Ying, LIU Bin800-8078Energy dissipation properties of cement backfill body under triaxial compression conditionsXU Wenbin, SONG Weidong, WANG Dongxu, YANG Baogui, PAN Weidong808-8149Experimental study on multi-parameter precursory characteristics before failure of coal samples under uniaxial loadingLYU Yukai, JIANG Yaodong, SONG Yimin, ZHAO Yixin815-82210Mechanism and application of parallel-arranged composed of truss cable and single cable with high preloadYIN Shuaifeng, CAI Wei, HE Fulian, TIAN Duo, SHI Haoyu823-83011Quantitative models of coalbed methane accumulation effect and type recognitionSHEN Jian, QIN Yong, CHEN Gang831-83612Aquifer parameter calculation of pumping test of group holes with recharge boundaryZHAI Xiaorong, WU Jiwen, HAN Dongya837-840,86313Coal reservoirs NMR T2 spectrum & gas-water relative permeability characteristics and their controlling factors in Bide-santang basin, western GuizhouGUO Chen, QIN Yong, Yang Zhaobiao, LU Lingling, YAN Qing841-85214Microscopic characteristics and formation mechanism of Upper Triassic Chang 7 tight oil reservoir in the southwest Ordos basinZHU Haihua, ZHONG Dakang, YAO Jingli, NIU Xiaobing, LIANG Xiaowei, ZHAO Yue853-86315Surface electricity and wettability of coal rock under the condition of different chemical environmentsLI Xiangchen, KANG Yili, YIN Zhongshan864-86916Poly-phase fault activities and the control on hydrocarbon accumulation of Yubei thrust belt, Tarim basin870-87917Combining D-InSAR and SVR for monitoring and prediction of mining subsidenceCHEN Bingqian, DENG Kazhong, FAN Hongdong880-88618Synthesis and activity of novel Cu-Mn composite catalyst for ventilation air methane combustionLIU Wenge, GUO Deyong, XU Xin, LIU Jianzhou, DUAN Liye887-891,90419The effects of Fe and FeS2 on iron-bearing minerals evolution in coal under reducing atmosphereXIONG Jinyu, LI Hanxu, CAO Xiang, XIN Yu, DONG Zhongbing892-89820Optimization of thickening process in coal slime treatmentXIE Guangyuan, JIANG Fuge, PENG Yaoli, NI Chao899-904 