煤矿安全2018，Vol.49Issue(3)：52-55,4.DOI:10.13347/j.cnki.mkaq.2018.03.014
爆破动载对不同龄期混凝土支护体影响的数值模拟
Numerical Simulation of the Influence of Blasting Vibration on Concrete Support with Different Ages
摘要
Abstract
In order to explore the influence of blasting vibration on shotcrete with different ages,taking the inclined roadway excavation engineering of Zouzhuang Mine south wing,the dynamic finite element software is used to analyze the peak vibration velocity and stress variation characteristics of shotcrete under the loading action of roadway tunneling blasting vibration.According to the PPV safety criterion,the damage of concrete with different ages is compared.The results showed that:at same age,the smaller the blast center distance is,the more serious blasting damage the shotcrete is,and the severe damage area of concrete spraying layer is 0 to 2.5 m;with the increase of the age of the concrete and the completion of cement hydration reaction,the mild damage range increases gradually,the mild damage range of concrete spray layer with the age of 1 d is 2.5 m to 15 m,3 d is 2.5 m to 16.25 m,7 d is 2.5 m to 16.875 m.关键词
爆破振动/喷射混凝土/数值模拟/PPV安全判据/钻爆法/巷道支护Key words
blasting vibration/shotcrete/numerical simulation/PPV safety criterion/drilling-blasting method/roadway support分类
矿业与冶金引用本文复制引用
宗琦,吴捷豪,马梽清..爆破动载对不同龄期混凝土支护体影响的数值模拟[J].煤矿安全,2018,49(3):52-55,4.基金项目
国家自然科学基金资助项目(51404010,51274009) （51404010,51274009）
安徽省高校自然科学研究重大资助项目(KY2017ZD11) （KY2017ZD11）
安徽省科技攻关计划资助项目(1501041123) （1501041123）
