水耦合爆破破岩的数值模拟研究  

Numerical Simulation Study on Rock Breaking by Water-coupled Blasting

作　　者：夏维学[1] 李桐[2,3] 郑祥 蒋宏杰[2] 陈明 XIA Weixue;LI Tong;ZHENG Xiang;JIANG Hongjie;CHEN Ming(Sinohydro Bureau 7 Co.,Ltd.,Chengdu 610000,China;State Key Laboratory of Water Resources Engineering and Management,Wuhan University,Wuhan 430072,China;Research Center on Levee Safety and Disaster Prevention of Ministry of Water Resources,Zhengzhou 450000,China)

机构地区：[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 [3]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

出　　处：《水电与新能源》2024年第4期6-10,共5页Hydropower and New Energy

基　　金：国家自然科学基金资助(51979205)。

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。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 medium,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 enhanced by the water medium.

关 键 词：水耦合爆破 裂纹扩展 破坏特征 数值模拟 

分 类 号：TV542[水利工程—水利水电工程]