矿业科学学报2025，Vol.10Issue(3)：458-466,9.DOI:10.19606/j.cnki.jmst.2025016
加锚岩体冲击动力特征试验研究
Experimental study on impact dynamic characteristics of bolted rock specimens
摘要
Abstract
In order to study the impact dynamic characteristics of bolted rock mass under dynamic loads,dynamic tests with different impact pressures were carried out on bolted and unbolted specimens using the SHPB test system.The stress wave propagation characteristics,stress-strain relationship,en-ergy evolution and failure modes of the specimens were compared and analyzed.The reinforcement effect of rockbolts on rock mass under dynamic loads was verified and the reinforcement mechanism of rockbolts was obtained.The results show that:(1)Under the same impact pressure,the transmission-wave amplitude and transmission energy of bolted specimens are greater than those of unbolted speci-mens.The dissipated energy of bolted specimens is always lower than that of unbolted specimens.As the impact pressure increases,the dissipated energy of the two types of specimens gradually increases,but the difference in dissipated energy gradually decreases.(2)The dynamic peak stress and peak strain of both bolted and unbolted specimens increase with the impact pressure,showing a significant strain rate effect.(3)The rockbolt pretension generates a compressive stress field inside the specimen,forming a conical reinforcement core surrounding the rockbolt.Under the same impact pressure,the fragmentation degree of bolted specimens is significantly lower than that of unbolted specimens.关键词
加锚试件/SHPB试验系统/冲击动力特征/锚固效应Key words
bolted specimen/SHPB test system/impact dynamic characteristics/bolting effect分类
矿山工程引用本文复制引用
王晓卿..加锚岩体冲击动力特征试验研究[J].矿业科学学报,2025,10(3):458-466,9.基金项目
国家自然科学基金(52274124,52274085) （52274124,52274085）
