爆破2025，Vol.42Issue(2)：22-30,9.DOI:10.3963/j.issn.1001-487X.2025.02.003
瞬态P波扰动下深埋圆形复合衬砌引水隧洞动力响应解析解及影响因素研究
Analytical Solution and Influencing Factors of Dynamic Response of Deep-buried Diversion Tunnel with Circular Composite Lining under Transient Disturbance by P-wave
摘要
Abstract
Blasting excavation generates transient P-waves that significantly impact tunnel stability.For water-filled diversion tunnels,the dynamic response of the surrounding rock differs from conventional dry tunnels.Most ex-isting analytical studies focus on the steady-state solution and single-lined tunnels,rarely accounting for composite linings or the presence of water.This paper investigates the transient stability response of deep-buried circular com-posite lining diversion tunnels under transient P-wave disturbances.The fluid within the tunnel is treated as a distinct medium,and the tunnel-lining interface is considered a non-ideal contact surface.By applying Fourier synthesis,wave function expansion,and trapezoidal quadrature formula,an analytical solution is derived.Validation through compari-son with existing literature demonstrates the method's effectiveness.The study analyzes the effects of Poisson's ratio of surrounding rock,the non-ideal interface's elastic coefficient,and the disturbance's loading duration on the dynam-ic stress concentration coefficient.Results indicate that the compressive stress concentrations occur at the roof and floor,while tensile counterpart concentrations appear at the two sidewalls during dynamic disturbance.As Poisson's ratio increases,there is a transition from tensile to compressive stress concentration,with a gradual degree in com-pressive stress intensity.Poor contact between the rock mass and liner induces oscillations in the stress time-history curve.The dynamic response converges accordingly as the elastic coefficients of an imperfect interface approach those of a perfect interface.With increasing blasting load duration,peak dynamic stress around the roof and floor initially rises,then stabilizes,while stress at the sidewalls initially decreases before leveling off.关键词
扰动P波/复合衬砌引水隧洞/瞬态响应/傅里叶合成技术/波函数展开法Key words
P-wave disturbance/diversion tunnel with composite lining/transient response/Fourier synthesis technique/wave function expansion method分类
矿业与冶金引用本文复制引用
李梅,陆宇嘉,梅万全,韩高升,陈光海,赵明生,柯昌均,任高峰..瞬态P波扰动下深埋圆形复合衬砌引水隧洞动力响应解析解及影响因素研究[J].爆破,2025,42(2):22-30,9.基金项目
湖北省技术创新专项重大项目(2022BEC040)近距离多层磷矿优化开采碳排放核算关键技术研发 （2022BEC040）
国家自然科学基金(52064003) Hubei Provincial Technological Innovation Special Major Project(2022BEC040):Research and Development of Key Technologies for Carbon Emission Accounting for Optimal Mining of Close-range Multilayer Phosphate Rock,National Natural Science Founda-tion of China(52064003) （52064003）
