安全与环境工程2025，Vol.32Issue(5)：1-14,14.DOI:10.13578/j.cnki.issn.1671-1556.20250230
高应力层状碎裂硬岩巷道渐进破裂与大变形机制的模拟分析
Simulation analysis on the mechanism of progressive fracture and large deformation in high-stress layered fractured hard rock roadway
摘要
Abstract
High-stress layered and fragmented hard rock roadways are prone to progressive fracturing and large deformation disasters under excavation unloading due to their multi-scale heterogeneous and discontinuous structural characteristics,posing threats to construction safety.To reveal the mechanisms behind such progressive failures,this study applied a three-dimensional bonded block damage model(BBDM)based on a metal mine case in China.The model couples block unit dislocation and structural plane contact damage mechanisms,enabling more realistic simulation of the progressive failure process.Based upon field structural plane identification data,a synthetic rockmass model(SRM)incorporating discrete fracture networks was established.The entire excavation-induced damage evolution process was systematically simulated.The results are as follows:Influenced by layered structural planes,thin weakened zones form at the roadway haunches,exhibiting continuous extrusion deformation(displacement reaching 40 mm)under compressive stress;rock blocks within the V-shaped failure zone at the roof arch display tensile damage characteristics and undergo progressive sliding toward the free surface(displacement reaching 23 mm).Simulations demonstrate that damage accumulation along structural planes leads to loss of rock integrity,triggering progressive fracturing and large deformation.By establishing the BBDM-SRM numerical approach,this research clarifies the structural plane control mechanism governing large deformations,providing a theoretical basis for optimizing support design in similar engineering projects.关键词
高应力层状碎裂硬岩巷道/渐进破裂/大变形机制/节理本构/合成岩体模型Key words
high-stress layered fractured hard rock roadway/progressive failure/large deformation disaster/joint constitutive/synthetic rockmass model(SRM)分类
资源环境引用本文复制引用
谢振坤,邱士利,李邵军,江权,李铁平,荆留杰..高应力层状碎裂硬岩巷道渐进破裂与大变形机制的模拟分析[J].安全与环境工程,2025,32(5):1-14,14.基金项目
国家自然科学基金面上项目(42377172) （42377172）
