炸药量对爆破振动高程效应影响的模型试验研究

Model test study on influence of explosive amount on elevation effect of blasting vibration

在露天矿山、交通、水利、能源等领域,爆破施工是比较普遍的方法。但是爆破振动在边坡上传播的过程中,会产生高程效应,是不可忽视的一个关键问题。本文通过混凝土模型爆破试验对露天矿爆破振动规律进行分析,研究爆破振动高程效应与炸药量间的关系。爆破试验表明:在正高程台阶模型中,随着药量增加,在高程效应明显区域,振速放大越明显。在负高程台阶模型中,台阶各测点振速随着药量的增加而增加,且药量越大,负高程差的存在,爆破振动衰减效应越明显。

In open pit mines,transportation,water conservancy,energy and other fields,blasting construction is a relatively common method.The vibration elevation effect caused by blasting is one of the important research contents of the vibration velocity propagation law on the slope.This paper analyzed the propagation law of blasting vibration in open pit mine by concrete model blasting test,and explored the effect of explosive charge on the blasting vibration elevation.The blasting test showed that:In the positive elevation step model,as the dose increased,the acceleration of the velocity was more pronounced in the area where the elevation effect appeared.In the negative elevation step model,the vibration velocity of each measuring point of the step increased with the increase of the dose.The larger the dose,the more obvious the effect of the negative elevation difference on the blasting vibration attenuation will be.