CAJ | 학술논문

合理准确地再现爆破漏斗的形成过程对爆破模拟及工程设计具有重要意义。通过设置人工节理，将模型进行预先离散，在离散元程序3DEC中实现了半无限介质中爆破模拟，包括从炮孔扩张、裂隙发展、岩块飞散到爆堆成型的全过程。讨论了爆炸荷载简化、施加方式和离散方法等对岩石爆破破碎、抛掷及爆堆形成过程的影响。其中对人工节理的倾角和分布进行了重点研究，通过优化人工节理方向，使得模拟结果更符合实际。将爆破块度与岩体离散化结合，提出考虑爆破块度的3DEC人工离散方法，提高了模拟结果的精度。采用该模型与现场试验进行比较，模拟得到的漏斗底半径及深度与试验结果相符。并且该模型大幅度提高计算速度和计算稳定性，可广泛应用于生产实践中，为爆破设计提供参考。
합리준학지재현폭파루두적형성과정대폭파모의급공정설계구유중요의의。통과설치인공절리，장모형진행예선리산，재리산원정서3DEC중실현료반무한개질중폭파모의，포괄종포공확장、렬극발전、암괴비산도폭퇴성형적전과정。토론료폭작하재간화、시가방식화리산방법등대암석폭파파쇄、포척급폭퇴형성과정적영향。기중대인공절리적경각화분포진행료중점연구，통과우화인공절리방향，사득모의결과경부합실제。장폭파괴도여암체리산화결합，제출고필폭파괴도적3DEC인공리산방법，제고료모의결과적정도。채용해모형여현장시험진행비교，모의득도적루두저반경급심도여시험결과상부。병차해모형대폭도제고계산속도화계산은정성，가엄범응용우생산실천중，위폭파설계제공삼고。
The reasonable simulation of formation process of blasting crater has great significance on blasting simulation and engineering design. By setting artificial joints in the discrete element model,the blasting process in a semi-infinite medium was simulated with software 3DEC. Then,the simplification and loading method of blast load and the effect of discrete approach on rock breakage and crater formation were discussed in this paper. Through opti-mizing the dip angel of artificial joints and combining with blasting fragmentation,an advanced discrete approach was put forward to improve simulation accuracy. Comparing simulation results of advanced discrete approach with filed test,the simulated radius and depth of crater agreed with experiment results well. Moreover,this model reduced oper-ation time greatly as the fewer discrete blocks.