多边界石方爆破药量计算原理与应用研究

Reseach on Principle of Charge Amount Calculation in Multilateral Boundary Rock and its Practice

不同边界条件下爆破破岩物理过程极不相同,并将影响炸药爆炸能量在介质内部的分布、介质的破碎和抛掷规律。在分析多边界条件下爆破作用规律的基础上,探讨了不同边界条件下药量计算原理和方法。研究表明:建立在平坦地形基础之上的集中药包计算公式,不能满足多边界条件下爆破作用的要求;地形、地质条件的变化,不但影响爆破作用效果,而且影响炸药爆炸能量的有效利用率;多边界条件下的药量计算公式,应包含地形、地质条件与爆破效果的关系。基于多边界石方爆破药量计算原理,提出了深孔爆破药量计算公式;结合路堑边坡岩体爆破工程,进行深孔控制爆破技术研究,爆破效果得到有效改善。

The physical process of rock broken by blast is quite defferent from different boundary condition,and which also affect the distribution of explosion energy and the broking and throwing of rock.On the basis of analyzing the law of blasting on different boundary conditions,this paper discussed the principle of explosive amount calculation.The reseach shows that the formula of concentrated charge based on flat foundation can not use for blasting in multilateral boundary condition;the changes of the terrain and geology not only affects the blasting result,but the utilization of explosion energy.So the charge amount calculation on multilateral boundary condition should consider the affluence of terrain and geology condition.At last,based on theis principle,we put forward the calculation formula of deep hole charge,and take the control blasting technology hole by hole in cutting slope blasting,the blast results get effective improvements.