Rock cracking and evolution mechanism under the action of new type of arc-shaped charge blasting

XU Guo-qing; HUANG Gao-xiang; WANG Xie-kang; LUO Deng-ze; LI Hong-tao; YAO Qiang

doi:10.16285/j.rsm.2024.00573

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Rock cracking and evolution mechanism under the action of new type of arc-shaped charge blasting

更新时间：2026-06-25

- Rock cracking and evolution mechanism under the action of new type of arc-shaped charge blasting
- Vol. 46, Issue 10, Pages: 3267-3279(2025)
- 作者机构：
  
  1. ．四川大学山区河流开发保护与治理全国重点实验室,四川,成都,610065
  2. ．四川省水利科学研究院,四川,成都,610072
  3. ．雅砻江流域水电开发有限公司,四川,成都,610051
- 作者简介：
- 基金信息：
- DOI：10.16285/j.rsm.2024.00573
  CLC： TU45
- Online First：14 October 2025，
  
  Published：2025
- 稿件说明：
移动端阅览
XU Guo-qing, HUANG Gao-xiang, WANG Xie-kang, et al. Rock cracking and evolution mechanism under the action of new type of arc-shaped charge blasting[J]. 2025, 46(10): 3267-3279.
DOI：

XU Guo-qing, HUANG Gao-xiang, WANG Xie-kang, et al. Rock cracking and evolution mechanism under the action of new type of arc-shaped charge blasting[J]. 2025, 46(10): 3267-3279. DOI： 10.16285/j.rsm.2024.00573.

摘要

研究了聚能爆破在硐室开挖光面爆破中的应用。根据聚能射流的基本原理，提出了一种弧形聚能装药结构（arc-shaped charge blasting，简称ASCB），建立了弧形聚能爆破数值模型，并与锥形药包聚能爆破（cone-shaped charge blasting，简称CSCB）进行了比较。结果表明：ASCB比CSCB炸药消耗少43.4%，有效装药率比CSCB高25.97%。当冲击波到达炮孔壁时，ASCB的冲击波比CSCB的冲击波更集中，有利于在聚能方向形成初始裂纹。ASCB施加在炮孔壁聚能侧的压力比CSCB高6.26%，而施加在非聚能侧的压力比CSCB低37.34%。ASCB在聚能方向产生的裂纹长度约为CSCB的两倍。因此，ASCB的聚能爆破效果优于CSCB。上述研究成果为定向预裂爆破提供了一种新的方法。

Abstract

The application of shaped charge blasting in smooth blasting during chamber excavation is investigated. Based on the principle of shaped charge jets

an arc-shaped charge structure is proposed. Numerical modeling of arc-shaped charge blasting (ASCB) is established and compared with cone-shaped charge blasting (CSCB). The findings indicate that ASCB consumes 43.4% less explosive than CSCB

and the efficiency of ASCB in the charge direction surpasses that of CSCB by 25.97%. Upon reaching the blast-hole wall

the shock wave of ASCB is more concentrated than that of CSCB

facilitating the formation of initial cracks in the energy-gathering direction. The pressure exerted by ASCB on the energy-gathering side of the blast-hole wall is 6.26% higher than that of CSCB

whereas the pressure on the non-energy-gathering side is 37.34% lower. The crack length generated by ASCB in the energy-accumulation direction is approximately twice that of CSCB. Consequently

it is concluded that the shaped charge blasting effect of ASCB is superior to that of CSCB. These research outcomes offer a novel approach for directional presplitting blasting.

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