1Topical areas of research needs in ground control:a state of the art review on coal mine ground controlSyd S PENG1-82Section optimization of deep gateways in three soft coal seamWANG Chen, TU Shihao, LI Zhaoxin, BAI Qingsheng, TU Hongsheng9-153Load bearing and failure mechanism of the multilayer roof with different tension and compression modulusYANG Jingxuan, LU Yan, LIU Changyou, YIN Shuaifeng16-234Effect of fractures cross connection on fluid flow characteristics of mining-induced rockZHU Hongguang, YI Cheng, JIANG Yaodong, XIE Heping, YANG Mingze24-285Mudstone mesoscopic failure process and generation mechanism of acoustic emission events based on real-time loading CT ScanDUAN Dong, ZHAO Yangsheng, FENG Xiaojing, ZHANG Xiangdong29-356Mechanical model of fracture mechanism of stope roof for working face with variable lengthWANG Xinfeng, GAO Mingzhong36-457Progressive failure characteristics and stability analysis of folded sliding surfaceHAN Liu, SHU Jisen, ZHOU Wei, WANG Siwen, MENG Qingwu, XU Jiankun46-538Prediction models of the carbonization depth of recycled concreteGENG Ou, ZHANG Xin, ZHANG Chengkai54-589Characteristic and representative model of rock damage process under constant confining stressZHANG Huimei, LEI Lina, YANG Gengshe59-6310Production systems optimization of a CBM well based on a time series BP neural networkWU Caifang, YAO Shuai, DU Yanfei64-6911A study of the unattached multiple superposed coalbed-methane system under stress conditionsYANG Zhaobiao, QIN Yong70-7512Hydrocarbon retention mechanism and accumulation model of syncline area in depression: as Putaohua reservoir in Gulong syncline,Songliao basinLIU Zongbao, ZONG Shoukui, JIANG Chong, FU Xiaofei, LYU Yanfang76-8513Characteristics of the hydrocarbon pathway system and transport model of the Chepaizi and its surrounding areas in the Junggar basin of ChinaWU Kangjun, LIU Luofu, XIAO Fei, ZHOU Changxiao, XU Zhengjian86-9614Study of a unique type of mouth bar deposition in steep slope-type fan deltasYANG Yanqiang, WU Shenghe97-10315Research on the diagenetic evolution of the upper fourth member of Shahejie formation reservoir in Bonan step-fault zoneXU Ningning, QIU Longwei, YANG Shengchao, XIE Chao, LIU Kuiyuan, SHAN Baojie, LIU Lianqi104-11516Dynamic evaluation for the deep reservoir in the northwest of Yitong basinCAI Change, LIU Zhen, DENG Shouwei, HE Junling, SONG Libin, ZHANG Shengbin, XU Shaohua116-12417Study of motion characteristics of the vibrated spiral dry separatorCHEN Jianzhong, SHEN Lijuan, LIU Caijin, SUI Zhanfeng125-13118Effect of temperature on coal-based reduction of an oolitic iron oreSUN Yongsheng, HAN Yuexin, GAO Peng, WANG Qin132-13719Study of filtration characteristics of PM2.5 by a powder-grain dual-layer granular bedSHI Kaiyu, YANG Guohua, TIAN Surui, CAI Zhuojun, XIANG hong138-14320Study of iron enrichment iron precipitation in molten slag under reducing atmosphereLI Hanxu, LI Jinzhi, ZHANG Dongmei, XIONG Jinyu, XIN Yu144-150 