长江科学院院报2016，Vol.33Issue(6)：83-87,93,6.DOI:10.11988/ckyyb.20150610
基于三参数强度准则的煤矿立井井壁流固耦合理论分析
Analysis of Coal Mine Shaft Lining with Fluid-solid Coupling Theory Based on Three-parameter Strength Criterion
摘要
Abstract
As porous medium, concretes of the shaft lining of coal mine are affected by underground water seepage flow. The three⁃parameter strength criterion and elastic⁃plastic theory are used to obtain the stress distribution of shaft lining in the elastic zone and plastic zone, and the analytical expression between the groundwater pressure P0 on shaft lining and the plastic zone radius rp . The results show that the ultimate bearing capacity of the shaft lining is the largest when seepage flow is not considered, and the hoop stressσθof the shaft lining is about 2.7 times of the uniaxial compressive strength of concrete cubes. However, when seepage flow is considered, the ultimate hydraulic pressure that the shaft lining can bear gradually decreases with the increases of porosityβ, and whenβequals 0.2, the hoop stress of the shaft lining is about 2.4 times of the uniaxial compressive strength of concrete cubes. There⁃fore, seepage flow has significant influence on the stress distribution of the shaft lining. Moreover, with the increase of hydraulic pressure, the radial stressσr and the hoop stressσθof concrete in the elastic zone gradually increase, however, when the hydraulic pressure reaches or exceeds the limit pressure(corresponding to the plastic radius), the radial stress σr and the hoop stressσθin this position remains unchanged. The results provide theoretical refer⁃ence for the structure design of shaft lining.关键词
煤矿立井井壁/三参数强度准则/弹塑性理论/流固耦合机理/地下水渗流Key words
shaft lining of coal mine/three-parameter strength criterion/elastic-plastic theory/fluid-solid coupling mechanism/groundwater seepage flow分类
矿业与冶金引用本文复制引用
李雪梅,荣传新,程桦..基于三参数强度准则的煤矿立井井壁流固耦合理论分析[J].长江科学院院报,2016,33(6):83-87,93,6.基金项目
国家自然科学基金项目（51374010，51474004）；安徽高校省级自然科学研究重点项目 （）
