河南城建学院学报2026，Vol.35Issue(4)：1-9,9.DOI:10.14140/j.cnki.hncjxb.2026.04.001
地应力对硬岩隧道掏槽爆破效果影响特征研究
Study on effects of ground stress on cutting blasting performance in hard rock tunnels
摘要
Abstract
In tunnel construction,a high ground stress environment poses a core technical challenge during the drilling and blasting process of deep-buried tunnels in mountainous areas.To investigate the impact of ground stress on the cutting blasting effect in hard rock tunnels,eight sets of working conditions were estab-lished based on the actual ground stress levels of a deep-buried hard rock tunnel project in Southwest Chi-na.Blasting numerical simulations under coupled ground stress conditions were conducted using ANSYS/LS-DYNA software.The results show that as the ground stress increases,both the degree and the extent of rock damage caused by blasting decrease.Under similar ground stress levels,the blasting effect is better in conditions with stress differences between horizontal and vertical directions than in conditions with hydrostat-ic pressure fields.As ground stress increases,the peak effective stress on the inner side of the cut also in-creases accordingly,while the peak effective stress on the outer side of the cut decreases.Based on this nu-merical simulation results,a blasting plan optimizing the cutting angle is proposed and verified in the proj-ect.The optimized plan increases the single-cycle footage by 0.275 m compared to the average before optimi-zation,representing an improvement of about 7.8%.It reduces the number of under-excavation and re-blast-ing,enhancing construction efficiency,safety and economy.The results provide an important reference for the design of blasting plans for hard rock tunnels under high ground stress conditions.关键词
地应力/掏槽爆破/数值模拟/有效应力Key words
ground stress/cutting blasting/numerical simulation/effective stress分类
矿业与冶金引用本文复制引用
洪辉文,章新生,郭玉洋,阳世隆,李育宗..地应力对硬岩隧道掏槽爆破效果影响特征研究[J].河南城建学院学报,2026,35(4):1-9,9.基金项目
国家自然科学基金项目(42107187) （42107187）
