不同耦合介质下岩石损伤特性数值模拟  

Numerical Simulation of Rock Damage Characteristics under Different Coupling Media

作　　者：李昊明 李祥龙[2,3] 王建国 胡启文[2,3] 武永博 LI Haoming;LI Xianglong;WANG Jianguo;HU Qiwen;WU Yongbo(School of Public Safety and Emergency Management,Kunming University of Science and Technology,Kunming 650093,China;Faculty of Land Resource Engineering,Kunming University of Science and Technology,Kunming 650093,China;Advanced Blasting Technology Engineering Research Center of Yunnan Province Education Department,Kunming 650093,China)

机构地区：[1]昆明理工大学公共安全与应急管理学院,昆明650093 [2]昆明理工大学国土资源工程学院,昆明650093 [3]云南省教育厅爆破新技术工程研究中心,昆明650093

出　　处：《有色金属工程》2024年第7期121-129,共9页Nonferrous Metals Engineering

基　　金：国家自然科学基金资助项目(52274083);云南省重大科技专项(202102AG050024)。

摘　　要：为探究空气和水不耦合爆破的岩石损伤特性,利用数值模拟分析了五组不耦合系数模型爆破后的岩石损伤演化过程、破裂范围以及孔壁峰值压力,最后开展现场试验验证数值模拟结果。结果表明:随着径向不耦合系数增大,空气不耦合爆破的岩石损伤区域范围衰减更加明显;水不耦合爆破产生的初始冲击波能量更大,传播过程中的能量利用率更高,且由于水介质的几乎不可压缩性,能量能够较平缓而均匀地作用在炮孔壁上;相同不耦合系数条件下,水不耦合爆破后的孔壁峰值压力更大,但水介质能够对孔壁产生较好的保护作用,进行隧道光面爆破试验后效果更好。以上研究可为隧道光面爆破装药结构选择提供一定的参考依据。In order to explore the rock damage characteristics of air and water uncoupled blasting,the rock damage evolution process,fracture range and peak pressure of hole wall after blasting of five groups of uncoupled coefficient models were analyzed by numerical simulation.Finally,field tests were carried out to verify the numerical simulation results.The results show that with the increase of the radial uncoupling coefficient,the attenuation of rock damage area caused by the air uncoupling blasting is more obvious.The initial shock wave energy produced by the water-uncoupled blasting is larger,and the energy utilization rate in the propagation process is higher.Due to the almost incompressibility of the water medium,the energy can act on the hole wall more smoothly and evenly.Under the condition of the same uncoupling coefficient,the peak pressure of the hole wall after water uncoupling blasting is larger,but the water medium can produce better protection effect on the hole wall,and the effect is better after the tunnel smooth blasting test.The above research can provide a certain reference for the selection of tunnel smooth blasting charge structure.

关 键 词：不同耦合介质 不耦合系数 孔壁峰值压力 裂纹扩展 岩石损伤 

分 类 号：TD85[矿业工程—金属矿开采]