Application of in-hole bag-hanging interval charging technology on deep-hole bench blasting project
YE Jianjun
YIN Xu
LIU Bingbing
HAN Xuejun
Abstract：In order to reduce the harmful effects of blasting,improve the energy utilization rate of explosives,and solve the problems in traditional interval charging techniques such as insufficient strength of barrier material,inadequate sealing,and the failure of the lower charge section to detonate due to pressure,a deep-hole in-hole bag-hanging segmented charging technology is proposed.This paper introduces the characteristics and applicable scope of the in-hole bag-hanging interval charging technology,and conducts tests in an open-pit mining project.Through analysing and comparing the blasting effect,obtained by the this design scheme and the original one,it is found that the boulder rate decreases by 52%,blasting vibration reduces by 12%,and the specific charge of explosives decreases by 8%,indicating a significant improvement in blasting effect.
Keywords：deep holeinterval chargingbench blastingharmful effectblasting effect
Publication Date：2025-09-30
Online Publishing Date：2025-10-15(First online date of this platform, not the publication date of the document)
Pages：5( 29-33 )