爆破2026，Vol.43Issue(1)：109-122,14.DOI:10.3963/j.issn.1001-487X.2026.01.012
爆破作业下黄土围岩的破碎特征及响应规律
Fragmentation Characteristics and Response Behavior of Loess Surrounding Rock under Blasting Operations
摘要
Abstract
In loess region blasting operations,the fragmentation and compaction effects on surrounding loess sig-nificantly influence both construction quality and blast design optimization.Field blasting experiments were conducted to examine these effects,utilizing digital image processing techniques to extract cavity surface crack and clod charac-teristics for loess fragmentation analysis.Concurrent measurements of blast cavity profiles and peripheral cracks were combined with laboratory testing to determine blast-affected soil zoning boundaries.Numerical modeling was imple-mented in LS-DYNA based on field data,with explosive length variations simulating different charge weights for loess blasting scenarios.The experimental results demonstrate that the post-blast loess exhibits five distinct elliptical zones:cavity zone,crushed zone,cracked zone,compacted zone,and elastic deformation zone.Within the crushed zone,the soil develops both wide fractures and short,thin cracks,predominantly interconnected through T-shaped nodal intersections.The resulting clods primarily display irregular quadrilateral morphology with complex geometries and extensive internal cracking networks.In contrast,the cracked zone predominantly develops elongated,narrow cracks interconnected through Y-shaped nodal intersections,exhibiting irregular pentagonal and hexagonal morpholo-gies.Experimental analysis reveals a hyperbolic correlation between explosive weight and both the radial dimensions of the blast cavity and its influence range.In contrast,axial dimensions demonstrate linear proportionality to explosive mass.关键词
现场爆破试验/破碎特征/爆破土体分区/黄土爆破模拟/不同炸药量/影响范围Key words
on-site blasting experiment/fragmentation characteristics/blast soil zoning/simulate blasting in loess/different charge weights/influence range分类
矿业与冶金引用本文复制引用
张文杰,邓龙胜,于渤,杨洲,杜中东,宋方述,邹煜..爆破作业下黄土围岩的破碎特征及响应规律[J].爆破,2026,43(1):109-122,14.基金项目
国家重点研发计划(2022YFC3003403) （2022YFC3003403）
国家自然科学基金(42472348) （42472348）
中央高校基本科研业务费资助(300102265502) National Key Research and Development Project of China(2022YFC3003403),National Natural Science Foundation of China(42472348),Fundamental Research Funds for the Central Universities(300102265502) （300102265502）
