爆破器材2025，Vol.54Issue(5)：57-64,8.DOI:10.3969/j.issn.1001-8352.2025.05.008
节理特征对岩体爆破裂纹扩展的影响
Influence of Joint Characteristics on Crack Propagation in Rock Blasting
摘要
Abstract
The influence of the number,width,position,and angle of joints on the propagation of rock blasting cracks was studied by numerical simulation.A numerical model of double-hole blasting was constructed using RHT model,and the propagation characteristics of explosive stress waves and explosive gases under different joint conditions were ana-lyzed,as well as their effects on crack propagation.The results show that when a single layer of horizontal joint is set paral-lel to the centerline of the blast hole,the central area of the joint is subjected to the superposition of stress waves and explo-sive gases,resulting in significantly increased damage and fracturing.And the increase in joint width has a more significant blocking effect on the propagation of explosive stress waves and explosive gases.When the joint width increases from 1 cm to 15 cm,the length of the end cracks decreases from 108.6 cm to 49.7 cm,indicating that the increase in joint width can lead to a decrease in the concentration of explosive gas and hinder the propagation of the end crack.When the joint angle is 30 °,the connectivity effect of the explosive cracks between the two blast holes is the worst.When the joint angle is 45 ° or 60 °,the connectivity effect is significant.The increase in joint width weakens this connectivity effect,indicating that the influence of joint angle and joint width on crack connectivity tends to be opposite.The rationality of the simulation re-sults was verified using the mining engineering example of Guilin Lushan Cement Plant.It can provide references for impro-ving the efficiency of blasting energy utilization,rock breaking effect,and safety in rock engineering.关键词
节理岩体爆破/节理特征/数值模拟/裂纹扩展Key words
blasting of jointed rock/joint characteristics/numerical simulation/crack propagation分类
矿业与冶金引用本文复制引用
费鸿禄,杨鹏亮,郭纪委,胡刚,丁炆..节理特征对岩体爆破裂纹扩展的影响[J].爆破器材,2025,54(5):57-64,8.基金项目
辽宁省教育厅基本科研项目(青年项目)(JYTQN2023206) （青年项目）
