1The structural dynamics of the shaft construction sector and strategic pathways for the advancement of intelligent shaft construction innovationsLIU Zhiqiang, SONG Zhaoyang, JING Guoye, CHENG Shouye, WANG Qiang, LYU Zhenghui1-142Research status of transient electromagnetic advanced detection technology in underground engineeringWANG Guoyuan, ZHANG Tongzhao, MA Deying, LIU Shujie15-203Research on the application and development of three commonly used formulas for calculating freezing wall thickness in ChinaXU Shurong, WANG Jianping, WANG Heng21-314Long period gob-side entry retaining to strengthen pressure relief gas extraction methodQIAN Wanxue, YU Fuyan, XIAO Yuhao, SONG Bo32-35,205Key technology of open TBM construction in bad section of deep roadway in coal mineZHANG Jiale, YANG Ming, ZHANG Lulu, CHU Yuelang, NIU Bin, YANG Xiesheng, LIANG Chengcheng, LI Mingjing, KANG Yiqiang36-43,316Rapid determination method for the firmness coefficient of coal in downholeYU Hualong, WANG Haijun, WU Yan, LIU Shande, XIAO Wenzhao, YANG Xiang44-487Research on support control technology of 12306 coal roadway in Hongqingliang MineYAO Xinyu, MA Yaorong, LIANG Lei, SUN Yanning, SUN Peng, JING Laiwang, ZHAO Ming49-53,318Research and practice on fire prevention technology of fully mechanized caving face during the working periodLI Jindou, Wang Dan54-589Study on the triggering mechanism of the"group pipe effect"in the freezing process of artificial strata under the action of groundwaterMIAO Siwei, WANG Bin, ZHAO Zong, ZHANG Zihao, LIANG Xiuling59-7110Study on mix proportion optimization of modified cement-based grouting material based on RSMWANG Shenghao, ZHOU Changshan, CUI Naixin72-79,5811Research on the protective materials for the borehole walls of the drainage boreholes in the high-pressure water-bearing bodies in underground mineSUN Houwei, JIANG Jun80-8412Research on monitoring data of coal mine shaft deviation based on R/S analysis methodBIN Xiongzhi, YIN Leijian, YUAN Shuai, JIANG Shuyin85-90,5813Analysis of hydrologic hole anomaly by freezing method of north inlet air shaft in Xuchang Iron MineWANG Long91-94,71 