爆破器材2025，Vol.54Issue(5)：47-56,10.DOI:10.3969/j.issn.1001-8352.2025.05.007
水介质不耦合爆破载荷作用下隧道围岩的损伤范围计算方法及裂隙损伤分形研究
Calculation Method for Damage Range and Fractal Analysis of Crack Damage of the Tunnel Surrounding Rock under Water-Uncoupled Blasting Load
摘要
Abstract
In order to study the damage and fracture range of tunnel surrounding rock under water-uncoupled blas-ting load,based on elastic wave theory,Mohr-Coulomb strength theory,and fracture mechanics principles,a calculation method for the damage range of the surrounding rock in the crushed zone,fracture zone I,and fracture zone II was pro-posed,considering the influence of circumferential stress.Simulations were conducted using LS-DYNA software to verify the reliability of the calculation formula for the damage range of single hole surrounding rock under water-uncoupled blasting load.Combining fractal dimension theory,the damage law of single-hole blasting in sandstone under water medium condi-tions was explored under different uncoupling coefficients.The results indicate that the radius of the crushed zone is 373 mm,located within the range of 300-400 mm in the simulation results.The radius of fracture zone I is 490 mm,located within the range of 470-500 mm in the simulation results.The radius of fracture zone II is 1 597 mm,slightly larger than the simulation results.Compared with existing calculation methods,this method has higher accuracy and error control with-in 10%.As the uncoupling coefficient increases,the damage range of the the surrounding rock under the water-uncoupled charge conditions will gradually decrease by 15%to 90%,which can effectively protect the rock wall.The increase of the water medium surface will increase the peak pressure of the shock wave acting on the hole wall,enhance the energy of the explosive acting on the surrounding rock,and increase the degree of rock fragmentation,resulting in more primary and secondary cracks,with growth rates of 0.03%,0.10%,12.68%,and 44.00%,respectively.关键词
水介质不耦合爆破/不耦合系数/分形维数/围岩裂隙Key words
water-uncoupled blasting/uncoupling coefficient/fractal dimension/cracks in the surrounding rock分类
矿业与冶金引用本文复制引用
陈泽屹,王林峰,周龙,刘余..水介质不耦合爆破载荷作用下隧道围岩的损伤范围计算方法及裂隙损伤分形研究[J].爆破器材,2025,54(5):47-56,10.基金项目
国家自然科学基金联合基金(U22A20600) （U22A20600）
重庆市研究生导师团队建设项目(JDDSTD2022009) （JDDSTD2022009）
三峡库区地质灾害教育部重点实验室(三峡大学)开放研究基金(2023KDZ07) （三峡大学）
