Development of numerical simulation program for blasting in heterogeneous and inhomogeneous rocks

非均质和非均质岩石爆破数值模拟程序的开发

• 批准号: 10650920
• 负责人: SASSA Koichi
• 金额: $ 1.41万
• 依托单位: Fukui University of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 1999
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10650920/
• 关键词: Blasting; Numerical simulation; Stress wave; Dynamic stress; Dynamic breakage; 波動による破壊現象; 破壊シミュレーション; 波動シミュレーション

In order to simulate dynamic stresses and wave propagation in heterogeneous and inhomogeneous materials, a numerical simulation code based on the finite difference approximation to the equation of motion was developed. In this code, breakage of materials by strong stress waves is taken into account. Therefore, by using this code, numerical simulation of rock breakage by blasting and blast vibration in heterogeneous and inhomogeneous rocks can be made. This code was written by Fortran and can run in a personal portable computer.Computation of stress distribution and pattern of rock breakage by blasting with one free face for various conditions were performed by using this code and a personal computer. The time histories of stresses caused by strong stress waves and pattern of rock breakage are shown by using graphic programs those were developed in this study. The results obtained coincided well with the ones expected from the results observed at actual blasting.

为了模拟非均匀和非均匀材料中的动应力和波的传播，开发了基于运动方程的有限差分近似的数值模拟程序。在本规范中，考虑了强应力波对材料的破坏。因此，利用该程序可以对非均质、非均质岩石中的爆破破岩和爆破振动进行数值模拟。该程序是用Fortran编写的，可在个人便携式计算机上运行，利用该程序和一台个人计算机计算了不同条件下单自由面爆破岩石的应力分布和破岩规律。利用本研究开发的图形化程序，给出了强应力波作用下的应力时程和岩石破坏形态。计算结果与实际爆破观测结果吻合较好。