摘要
在国内外关于爆炸应力波衰减规律研究成果的基础上,运用量纲分析方法推导得出爆炸应力波在中远区岩石中的一般衰减模型。以青海威斯特德尔尼露天铜矿地质数据为背景,借助LS-DYNA大型动力有限元程序建立双台阶模型进行求解运算,得到监测点应力数据,由数据分布规律确定应力波衰减公式,同时,将求解结果用于拟合推导得出的一般衰减模型,从而得到模拟原型-青海威斯特德尔尼露天矿台阶爆破中远区岩体应力衰减公式。拟合结果表明:运用量纲分析方法推导得出的爆炸应力波一般衰减模型能有效反映应力波在岩石中的衰减规律。
Based on the research results about the attenuation laws of blasting stress wave at home and abroad,a general attenuation model of blasting stress wave in rock at moderate or far distance was derived quickly and simply by using the dimensional analysis method. Taking the geological data of Qinghai West Del Open-pit Copper Mine as background,the large dynamic finite element program LS-DYNA was applied to establish the double-step-model for calculation. The stress data of the monitoring points were obtained,and the attenuation formula of stress wave was determined by the law of data distribution. At the same time,the computational results were applied for fitting the derived general attenuation model,so the attenuation formula of stress in rock at moderate or far distance during the bench blasting of the simulation prototype,namely the Qinghai West Del Open-pit Copper Mine,was obtained. The fitting results showed that the general attenuation model of blasting stress wave derived by the dimensional analysis method can effectively reflect the attenuation laws of stress wave in rock.
出处
《中国安全生产科学技术》
CAS
CSCD
北大核心
2017年第1期16-21,共6页
Journal of Safety Science and Technology
基金
福建省自然科学基金项目(2011J01310)
关键词
量纲分析
爆炸应力波
数值模拟
衰减规律
dimensional analysis
blasting stress wave
numerical simulation
attenuation law
