不同聚能爆破模式应力波传播及裂纹扩展规律研究

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振动与冲击 ›› 2020, Vol. 39 ›› Issue (4) : 157-164.

论文

梁洪达1，郭鹏飞1,2，孙鼎杰1，叶铿铿1，邹宝平3，袁亚迪1

作者信息 +

A study on crack propagation and stress wave propagation in different blasting modes of shaped energy blasting

LIANG Hongda1,GUO Pengfei1,2,SUN Dingjie1,YE Kengkeng1,ZOU Baoping3,YUAN Yadi1

Author information +

文章历史 +

摘要

为研究双向聚能拉伸爆破应力波传播及裂纹演化规律，采用理论分析、数值模拟等方法，研究单孔爆破、连孔爆破、间隔爆破爆炸应力波的传播形式和裂纹扩展规律。结果表明，连孔聚能爆破和间隔聚能爆破的裂纹扩展长度都在水平径向上达到了900 mm，而单孔聚能爆破仅600 mm，说明连孔聚能爆破时应力波的叠加使切向拉应力增大，聚能方向形成了与孔心连线相平行的裂纹，裂纹开裂延伸，直至贯通。间隔爆破时随着应力波的传播，裂纹尖端张拉应力区也不断向前推移，促使裂纹继续发展，直至贯通。该项研究在岩石成型爆破中提供了有效真实的参考依据，具有广阔的应用前景。

Abstract

In order to study the propagation of stress wave and crack evolution in biaxial energy accumulation blasting, the propagation form and crack propagation law of stress wave in single hole blasting, continuous hole blasting, and deep hole blasting were studied by theoretical analysis and numerical simulation.The results show that the crack propagation length of continuous hole energy accumulation blasting and deep hole energy accumulation blasting is 900 mm in horizontal radius, while that of single hole energy accumulation blasting is only 600 mm, which indicates that the superposition of stress wave increases the tangential tensile stress, and the energy accumulation direction forms cracks is parallel to the hole center line, and the crack extends until it runs through.With the propagation of stress wave in deep hole blasting crack, the tip tension stress zone is also moving forward, promoting the crack to continue to develop until it runs through.This study provides an effective and real reference for rock forming blasting and has a broad application prospect.

导出引用

梁洪达1，郭鹏飞1,2，孙鼎杰1，叶铿铿1，邹宝平3，袁亚迪1. 不同聚能爆破模式应力波传播及裂纹扩展规律研究[J]. 振动与冲击, 2020, 39(4): 157-164

LIANG Hongda1,GUO Pengfei1,2,SUN Dingjie1,YE Kengkeng1,ZOU Baoping3,YUAN Yadi1. A study on crack propagation and stress wave propagation in different blasting modes of shaped energy blasting[J]. Journal of Vibration and Shock, 2020, 39(4): 157-164

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