深部巷道围岩热-固耦合分析及数值模拟  

Thermal-solid Coupling Analysis and Numerical Simulation for Surrounding Rock in Deep Roadway

作　　者：张强[1,2] 

机构地区：[1]山东科技大学矿山灾害预防控制省部共建国家重点实验室培育基地,山东青岛266590 [2]山东科技大学矿业与安全工程学院,山东青岛266590

出　　处：《煤矿安全》2016年第4期203-206,210,共5页Safety in Coal Mines

基　　金：国家自然科学基金资助项目(51274133;51474137;51474136);山东省自然科学基金重点资助项目(ZR2012EEZ002)

摘　　要：为了研究深部巷道围岩温度场、应力场的分布规律及其耦合作用,基于理论分析,得出热应力影响下巷道围岩应力场的解析解,并通过数值模拟和现场监测研究了热应力对围岩稳定性的影响。研究表明:围岩温度分布呈非线性变化,表层温度梯度大,围岩深部温度梯度小,且热应力与温度梯度呈正比;随着巷内温度与原岩温度差值的增大,围岩塑性区、应力场、位移场都有不同程度的增大;巷内温度在风流作用下,温度不断地变化,形成的热应力作为附加应力会对深部巷道围岩应力场施加变化的作用力,易使巷道围岩发生挠动失稳。In order to study the distribution law of the temperature field and stress field of deep roadway surrounding rock and its coupling effect,based on theoretical analysis,we obtain the analytical solution of stress field in surrounding rock of roadway under the influence of thermal stress,the influence of thermal stress on the stability of surrounding rock is studied by numerical simulation and field monitoring. The research shows that the surrounding rock temperature distribution is a nonlinear change,the temperature gradient of roadway surface is large,the deep temperature gradient of surrounding rock is small,and the thermal stress is proportional to the temperature gradient; with the increase of the difference between temperature in roadway and temperature in the surrounding rock,the plastic zone,stress field and displacement field of surrounding rock have different degrees of increasing; under the influence of constantly changing air current temperature in the roadway,as an additional stress,the thermal stress can be applied to the surrounding rock stress field in deep roadway,which easily causes the instability of roadway surrounding rock torsion.

关 键 词：深部巷道 温度场 应力场 热-固耦合 围岩稳定性 

分 类 号：TD322.4[矿业工程—矿井建设]