摘要
为研究地下储库整体稳定性和损伤破坏规律,提出基于变形稳定理论的地下储库群稳定性判别方法。将强度折减系数K和塑性余能范数ΔE的关系曲线作为储库整体稳定性和破坏的关键判据,用不平衡力展示失稳破坏的部位和模式。建立以屈服函数作为损伤控制变量的分析方法,并用于研究储库不平衡力与位移的关系。研究双储库的临界间距、破坏模式和埋深对储库稳定性的影响,分析单储库洞周围岩损伤对不平衡力的作用。研究结果表明,用不平衡力和塑性余能范数来定量评价地下储库群的稳定性是合适的,基于屈服函数的破损分析可为岩石进入塑性阶段后的力学行为研究提供新的思路。
In order to study the global stability of underground storages and the laws of failure and damage, a method for stability analysis of underground energy storage group was developed based on the deformation stability theory. The relation curve of plastic complementary energy versus strength reduction factor served as the global stability and failure criterion of underground storage group, while the unbalanced force was used to indicate the location and pattem of failure. With the yield function as control variable of damage, an analytical method for salt rock was established and applied to study of the relation between the unbalanced force and displacement. The critical cavern spacing, failure pattems and buried-depth of double caverns were presented. Meanwhile, the effect of rock damage around a single cavem on the unbalanced force was studied. The results show that the unbalanced force and plastic complementary energy are suitable for quantitatively evaluating the stability of underground storage group： and the damage analysis based on the yield function provides a new approach to investigate the mechanical behavior of rock in plastic state.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2012年第9期1729-1736,共8页
Chinese Journal of Rock Mechanics and Engineering
基金
国家重点基础研究发展计划(973)项目(2009CB724604)
国家自然科学基金资助项目(50925931)
关键词
岩石力学
变形稳定理论
整体稳定性
破损
破坏分析
塑性余能
不平衡力
rock mechanics
deformation stability theory
global stability
failure and damage
failure analysis
plastic complementary energy
unbalanced force
