摘要
为研究空孔对爆破荷载作用下岩石裂纹扩展的影响,采用ANSYS/LS-DYNA对白云石大理岩模型进行爆破裂纹扩展过程数值模拟研究,结果表明:爆炸应力波的最大应力峰值为64.98 MPa,随后应力波呈振荡变化直至模型断裂;爆破裂纹扩展速度呈周期性变化,随着距离的增大而衰减;空孔对裂纹成缝具有导向作用,空孔附近出现应力集中现象,装药孔爆炸应力波传播至空孔产生了反射拉伸应力波和绕射应力波,促进了裂纹扩展,最终使裂纹贯通。
In order to study the effect of void holes on the crack extension of rock under blasting load,ANSYS/LS-DYNA was employed to carry out the numerical simulation of the blasting crack extension process with a dolomitic marble model.The results show that the maximum peak stress of the blast stress wave was 64.98 MPa,later the stress wave exhibited oscillating until the breakage of the model.The velocity of the crack extension varied periodically and finally decayed with the increase of distance.The crack development was directed by the void holes,and the concentration of stress took place around the void holes,the stress wave extended from blast holes to void holes resulted in reflected tensile stress waves and the bypass waves,which facilitated the crack extension and link up.
作者
罗世云
韩孟微
刘国寅
Luo Shiyun;Han Mengwei;Liu Guoyin(Kunming Prospecting Design Institute of China Nonferrous Metals Industry Co.,Ltd.,Kunming Yunnan 650051,China;Yunnan Yunling Highway Engineering Cetified Safety Engineer Co.,Ltd.,Kunming Yunnan 650206,China;Kunming Kunze Mining Technology Co.,Ltd.,Kunming Yunnan 650224,China)
出处
《化工矿物与加工》
CAS
2022年第3期9-13,共5页
Industrial Minerals & Processing
基金
国家自然科学基金(52164010)。
作者简介
罗世云(1986-),男,硕士,主要从事采矿方法与施工工艺研究。;通信作者:韩孟微(1988-),男,硕士,主要从事交通运输工程安全技术研究。
