采矿与岩层控制工程学报2024，Vol.6Issue(1)：61-75,15.
深部直墙半圆拱巷道围岩时效损伤劣化特征与动态补强技术
Characteristics of aging damage and deterioration of surrounding rock of deep straight wall and semi-circular arch roadway and dynamic reinforcement technology
摘要
Abstract
As coal mining progressively reaches the deeper strata,the substantial deformation and rheological properties of mine roadways have become one of the most challenging issues to supporting systems.In order to investigate the aging characteristics of damage and dete-rioration of the rock surrounding deep mine roadways and develop dynamic reinforcement technologies,a comprehensive study ncorporating laboratory experiments,theoretical analysis,numerical simulation and field testing was conducted.The findings include:(1)An analytical solution for the deformation pattern of circular,axisymmetric roadways was derived using the Laplace inverse transformation.Via a combination of theoretical analysis,equivalent transformation for non-circular roadways and field tests,the radius of the plastic zone was determined to be between 1.5 and 2.1 m,which in turn leads to an analytical solution for the aging deformation of the surrounding rock for straight-wall semicircular arch road-ways.(2)Based on models of elastic and elastoplastic roadways,energy dissipation was employed to characterize the aging properties of surrounding rock damage and deterioration and the evolution trend of the plastic zone,de-termining an optimal timing for the primary support.(3)The evolutionary trend of timeliness damage and deterio-ration of the surrounding rock after primary support was obtained.Based on the peak ratio of vertical stress,a secondary support scheme and its timing have been determined.The shear stress,vertical stress and the range of the plastic zone in the surrounding rock were further analyzed,determining the length of secondary support bolts to be 3.0 m and setting the support timing to be between 40 and 70 days.The research outcomes provide a theoret-ical foundation and practical guidance for the design and maintenance of roadways in deep coal mines.关键词
深部巷道/损伤劣化/时效特征/动态补强Key words
deep roadway/damage deterioration/time-dependent characteristics/dynamic reinforcement分类
矿业与冶金引用本文复制引用
赵光明,刘之喜,孟祥瑞,秦志宏..深部直墙半圆拱巷道围岩时效损伤劣化特征与动态补强技术[J].采矿与岩层控制工程学报,2024,6(1):61-75,15.基金项目
国家自然科学基金资助项目(51974009) （51974009）
安徽省科技重大专项资助项目(202203a07020011) （202203a07020011）
高校协同创新资助项目(GXXT-2021-075) （GXXT-2021-075）
安徽省"特支计划"领军人才资助项目(T000508) （T000508）
安徽省高校优秀科研创新团队资助项目(2022AH010053) （2022AH010053）
