柱状药包在岩石介质中爆破破裂区域的理论分析及数值模拟  

Theoretical Analysis and Numerical Simulation of Blasting Fracture Zone of Cylindrical Charge in Rock Medium

作　　者：张函 张君华 戴丽萍[1] ZHANG Han;ZHANG Jun-Hua;DAI Li-ping(Beijing Information Science and Technology University ,Beijing100192,China)

机构地区：[1]北京信息科技大学

出　　处：《煤炭技术》2018年第12期26-28,共3页Coal Technology

基　　金：国家自然科学基金项目(11472057)

摘　　要：将线密度概念引入柱状药包爆破后岩石破裂区域的理论计算模型中,提出各个区域的划分判据,并采用有限元计算方法对柱状药包在岩石介质中爆破破裂区域进行数值仿真研究。研究结果表明:压碎区域界面的判据为冲击波传播速度衰减为岩石纵波波速,破裂区域内2个界面的判据分别为应力波衰减为岩石的抗压强度和抗拉强度。The concept of linear density is introduced into the theoretical calculation model of rock rupture area after cylindrical charge blasting,and the criteria for dividing each area are put forward.The results show that the criterion of the interface in the crushing zone is that the velocity of shock wave attenuates to the velocity of rock longitudinal wave,and the criterion of the two interfaces in the fracture zone is that the stress wave attenuates to the compressive strength and tensile strength of rock respectively.

关 键 词：爆破工程 应力波 破坏区域 

分 类 号：O382[理学—流体力学]