摘要
针对三孔爆破岩石裂隙扩展与贯通,使用LS-DYNA数值模拟软件建立两种岩石三孔爆破模型,计算出三孔爆破荷载下岩石的损伤特征,并对结果进行分析。研究发现,孔间距离的大小会对爆破所产生的裂隙特征产生影响,距离较短的炮孔之间损伤加重,而距离较长的炮孔之间损伤会受到抑制。同时,应力叠加区域附近的区域损伤也会受到抑制。炮孔间距的大小以及炮孔与自由面的距离,也会影响破碎区大小以及裂隙区裂缝的扩展角度。
Two types of rock three hole blasting models were established using LS-DYNA numerical simulation software to investigate the expansion and penetration of rock fractures during three hole blasting.The damage characteristics of the rock under three hole blasting loads were calculated and the results were analyzed.Research has found that the distance between holes can have an impact on the characteristics of cracks.The damage between holes with shorter distances increases,while the damage between holes with longer distances is suppressed.At the same time,the damage near the stress superposition area will also be suppressed.The size of the spacing between blast holes and the distance between the blast holes and the free surface can also affect the size of the fracture zone and the angle of crack propagation in the fracture zone.
作者
邰成群
杨春喜
张祝九
Tai Chengqun;Yang Chunxi;Zhang Zhujiu(School of Land and Resources Engineering,Kunming University of Science and Technology,Kunming Yunnan 650093,China;Qinghai Hongxin Coal Mining Co.,Ltd.,Golmud Qinghai 816000,China;Chihong Zinc and Germanium Co.,Ltd.,Qujing Yunnan 655011,China)
出处
《山西冶金》
CAS
2023年第8期67-70,共4页
Shanxi Metallurgy
关键词
三孔爆破
岩石
数值模拟
three hole blasting
rock
numerical simulation
作者简介
第一作者:邰成群(1998-),男,江苏盐城人,昆明理工大学硕士研究生在读,主要从事爆破理论和爆炸冲击动力学研究工作;通讯作者:张祝九(1984-),男,云南曲靖人,本科,毕业于中国矿业大学,工程师,主要从事矿山采矿及充填技术研究工作。
