Modern Mining ›› 2024, Vol. 40 ›› Issue (06): 71-.
Previous Articles Next Articles
Blasting vibration is a common blasting hazard in the production process of open-pit mines.
In order to reduce the influence of blasting vibration on the fixed slope of the mine，taking Wushan Copper
molybdenum Mine as the background，through theoretical calculation，the linear charge density values of
pre-splitting holes in four typical lithology of granite in the south section，granite in the north section，brec⁃
cia lava and sub-plagioclase granite porphyry were obtained，and the pre-splitting blasting field tests with
different linear charge densities of typical lithology were carried out.The results show that when the pre
crack is completely cracked，the vibration reduction rates of the measuring points of the four lithology can
reach 37.15%，43.77%，42.86% and 48.36% respectively by using the theoretically calculated line charge
density parameters.And with the increase of pre-crack cracking degree，the vibration reduction rate of the
measuring point is obviously improved.When the pre-crack is completely cracked，the effect of increasing
the degree of cracking on the vibration reduction rate is gradually reduced.Reasonable pre-splitting blasting
parameters can effectively reduce the blasting vibration velocity near the fixed side，which has important ref⁃
erence significance for mine safety.
