1Development and performance study of environmental dust suppressants for open-pit mineYIN Yanzhang, WANG Quan, SONG Quandong, LI Ye, LI Chao, SU HaoxiangExperiment & Research1-72Research on reducing aggregate powder content in thin-layer limestone minesZHANG Jie, LEI Zhan, LI Hongwei, WU WeimingExperiment & Research8-10,283Construction design and simulation analysis of blasting expanding excavation of large-section ultra-deep passQIAN Mingyuan, CHENG Lu, LU Haisheng, CUI Ziheng, YUAN Zhengwei, YAO ChangshengSpecial Critique11-14,384Optimal selection and application of reasonable millisecond delay time for bench blasting in open-pit minesHUANG Xuefeng, CHU Yakun, YANG Saiqun, LI Hongwei, LIANG HaoSpecial Critique15-205Study on charging quality stability of small diameter emulsion explosiveTENG Guihong, XU Yonggang, LI Shengping, CUI YuQuestion & Discussion21-246Study on safety application of a new type of digital electronic detonator ignition agentLI QixiuQuestion & Discussion25-287Discussion on wall deposition problem in production of powdery emulsion explosiveLI Zehua, WANG Quan, YANG Shichun, FANG Jingxian, YANG Yaoyong, LIU ZhiyuQuestion & Discussion29-338Construction of risk assessment system for the destruction of waste shellsJIAO GuodongQuestion & Discussion34-38