爆破器材2025，Vol.54Issue(4)：46-54,64,10.DOI:10.3969/j.issn.1001-8352.2025.04.008
铁路隧道机械化装药掏槽爆破参数的优化
Parameter Optimization of Mechanized Charging Cut Blasting in Railway Tunnel Construction
摘要
Abstract
In order to realize the application of intelligent blasting technology in tunnels,parameter optimization of mechanized charging cut blasting in railway tunnel blasting construction was studied.The range of spacing between the hol-low hole and the central of the hollow hole has been determined through theoretical calculations.Using LS-DYNA numerical simulation software,simulation studies were conducted on blasting schemes with a distance of 12.5,22.5 cm and 42.5 cm between the center of the hollow hole and the hollow hole within the theoretical range.Effective stress,damage evolution,and blasting vibration of the bottom cross section of the hole,cross section at a distance of 1/2 of the length of the blast hole from the detonation center,and the cross section at the orifice in each simulation scheme were analyzed.The results show that as the distance between the central hollow hole and the hollow hole increases,the peak effective stress and the damage area in the cutting area show a trend of first increasing and then decreasing,and the average blasting vibration velocity shows a decreasing trend.The the slot penetration gradually becomes worse.After comprehensive analysis of three blasting models,the distance between the center cut hole and the hollow hole was determined to be 22.5 cm.After applying the op-timized blasting parameters to on-site blasting,it was found that the rock fragmentation rate significantly decreased,with an average linear over excavation reduction of 19.23%.The blasting outcome was good.关键词
混装炸药/空孔与掏槽孔间距/空孔效应/数值模拟/有效应力Key words
mixed explosive/distance between empty holes and cavity holes/porosity effect/numerical simulation/effective stress分类
矿业与冶金引用本文复制引用
高轩,尹训江,王帅帅,苗龙刚,郭亚斌..铁路隧道机械化装药掏槽爆破参数的优化[J].爆破器材,2025,54(4):46-54,64,10.基金项目
中交第二公路工程局有限公司重点研发项目(2021X-4-17) （2021X-4-17）
