水耦合爆破破岩的数值模拟研究
Numerical Simulation Study on Rock Breaking by Water-coupled Blasting
夏维学 1李桐 2郑祥 1蒋宏杰 3陈明3
作者信息
- 1. 中国水利水电第七工程局有限公司,四川成都 610000
- 2. 水资源工程与调度全国重点实验室(武汉大学),湖北武汉 430072;水利部提防安全与病害防治工程技术研究中心,河南 郑州 450000
- 3. 水资源工程与调度全国重点实验室(武汉大学),湖北武汉 430072
- 折叠
摘要
水耦合爆破因其节能、高效等优势在工程爆破中具有广阔的应用前景.利用数值模拟水耦合爆破破岩过程及最终破坏特征,与空气耦合爆破对比表明,水介质加快了岩体裂纹扩展速度,提高了岩体的破碎程度与范围;岩体中的初始裂纹与爆源交叉时,水增强了初始裂纹对破坏的导向作用;岩体中的初始裂纹与爆源无交叉时,闭合裂纹使爆炸破坏作用向弱面集中,水增强了闭合裂纹周围的岩体破碎效果.
Abstract
Water-coupled blasting has broad application prospects in engineering blasting due to its advantages of energy saving and high efficiency.Numerical simulation is carried out to study the fracture development process and the ultimate failure characteristics of rock mass under water-coupled blasting,and the water-coupled blasting and the air-coupled blasting are compared.The results show that the crack propagation speed of rock mass is accelerated by the water medi-um,and the breakage degree and range of the rock mass are increased.For rock mass with initial cracks intersecting with the explosive source,the damage guiding effect of initial cracks is enhanced by the water medium.For rock mass with initial cracks not intersecting with the explosive source,the explosive damage effect is concentrated on the weak surface of the rock mass due to closed cracks.While the fragmentation of the rock mass around the closed cracks is en-hanced by the water medium.
关键词
水耦合爆破/裂纹扩展/破坏特征/数值模拟Key words
water-coupled blasting/crack propagation/failure characteristics/numerical simulation引用本文复制引用
出版年
2024
NETL
NSTL
维普
万方数据