Application of wide hole spacing and small resistance line blasting technology in Anjialing Open-pit Mines
LYU Dexian
HAN Dawei
Abstract：In order to effectively improve the quality of deep hole blasting in Anjialing Open-pit Mine and reduce the generation of large blocks and bottom pulling,a comparison is made between rectangular hole layout and wide hole spacing small resistance line triangular hole layout blasting tests using a diameter of φ 250 mm roller drill.The results show that the use of wide hole spacing and small resistance line triangle piercing blasting technology has significant advantages in deep hole step blasting in open-pit mines,which optimizes the utilization of explosive energy more effectively than rectangular piercing blasting technology,greatly improves the blasting quality,and successfully reduces the unit consumption of explosives.
Keywords：triangle hole layoutrectangular cloth holebench blastingspecific chargewide hole spacing and small resistance lineblasting quality
Publication Date：2025-06-15
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 54-57 )