立井井壁温度应力特征分析  

Characteristic analysis of temperature stresses of shaft wall

作　　者：刘金龙[1] 陈陆望[2] 王吉利[3] 

机构地区：[1]合肥学院建筑工程系,合肥230022 [2]合肥工业大学资源与环境工程学院,合肥230009 [3]中国科学院武汉岩土力学研究所,武汉430071

出　　处：《岩土力学》2011年第8期2386-2390,共5页Rock and Soil Mechanics

基　　金：安徽省高等学校省级自然科学研究项目(No.KJ2008B259);住房和城乡建设部研究开发项目(No.2010-K3-7)

摘　　要：基于弹性理论,推导得到了立井内外壁温度差引起的温度应力解答。数学分析表明,立井内壁温度高于外壁温度时,温度应力分量σθ与σz在内壁处取得最大值,在外壁处取得最小值。温度应力分量σz随着立井的弹性模量E、泊松比μ、膨胀系数αf、立井深度z的增大而增大,随着温差ΔT=Tb?Ta的增大而减小。进一步分析表明,温度应力导致立井内壁处最先发生破裂,这与大量实际立井破裂现象完全吻合。诱发立井破坏的因素中,温度应力的权重大于立井自重荷载的权重,可见温度应力是导致立井破裂的重要因素。Based on the theory of elasticity, the analytic solution of temperature stress of shaft wall of coal mine is deduced. It is shown that when the temperature of inwall is higher than that of ectotheca of shaft wall, the temperature stressesδz and δz get maximal values at inwall and minimal values at ectotheca. Temperature stress tx will become larger with increases of elastic modulus E, Poisson＇s ratio μ, coefficient of dilatation δf and depth of shaft wall z separately; while temperature stress trz will decrease with increase of temperature difference AT = Tb - Ta. It is also shown that the place of inwall of shaft wall will be broken earlier than ectotheca, which is validated by reality. In the factors which induced the failure of shaft wall, the weigh of temperature stress is larger than that of shaft wall dead weight. Therefore, temperature stress plays an important role in the failure of shaft wall.

关 键 词：立井 温差 温度应力 破裂 

分 类 号：TD352[矿业工程—矿井建设]