摘要
基于危岩体裂隙水体爆破动力考虑,建立了危岩体裂隙水体动力物理模型,将裂隙水动水冲击压力的形成归结于爆破动力对裂隙水体不断施加初始速度,经过理论推导得出垂直于主控结构面的动水冲击压力公式以及沿裂隙方向的裂隙水压增加幅值,最终给出爆破动力作用下裂隙水的动水冲击压力计算表达式。以望霞W2-1危岩体为例,计算分析得出爆破动力对裂隙水体作用时间为0.2~0.25 s;爆破动力对裂隙水体压力改变近10%,对危岩裂隙水体压力影响显著。
Based on the consideration of crack surge pressure of perilous rock under the blasting load,physical model of crack surge pressure of unstable rock was established.The formation of crack surge pressure is attributed to the initial velocity exerting to crack water by the blasting power.Through theoretical derivation formula of dynamic water impact pressure perpendicular to dominant fissure and increasing amplitude of crack pressure along the fissure direction were determined.Lastly,this paper gave the calculation expression of crack surge pressure under the blasting load.Taking the perilous rock W2-1 in Wangxia for example,action time to crack water was 0.2~0.25s by the blasting power;crack pressure changed nearly 10%by the blasting power which affected the crack surge pressure markedly.
作者
陈正东
周云涛
CHEN Zhengdong;ZHOU Yuntao(2nd Engineering Investigation Institute,Guizhou Bureau of Geology and Mineral,Zunyi Guizhou 563000,China;Institute of Exploration Technology,CAGS,Chengdu Sichuan 611734,China;Technology Innovation Center for Risk Prevention and Mitigation of Geohazard,MNR,Chengdu Sichuan 611734,China)
出处
《钻探工程》
2023年第5期18-22,共5页
Drilling Engineering
基金
国家重点研发计划专项项目“膨胀土滑坡和工程边坡防护工程健康诊断和快速修复技术”(编号:2019YFC1509904)
中国地质调查局地质调查项目“高陡碎屑坡生态治理技术应用示范”(编号:DD20230087)。
