Mechanism Research of the Effects of Empty Hole in Parallel Cut Blasting
Zhou Shaoying
Wang Haibo
Zong Qi
Abstract：In cut blasting, the presence of empty hole has important significance. Through the theoretical analysis of the mechanism, it is concluded that the empty hole has three main functions:first, it can cause the explosion stress concentration, lead to the orientation of blasting crack development; second, the empty hole adds a free surface to other charging cutting holes, strengthens the hole wall stress wave reflection effect, enhances groove cavity rock crushing, and provides the guidance for the broken rock and expansion mobile space;third, the shearing action between empty hole and the charging cutting hole further strengthen the rock damage.
Keywords：cut blastinglarge diameterempty holemechanism of action
Publication Date：2014-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：3( 23-25 )