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
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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。Abstract: 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.
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[1] Wong T F.Effect of temperature and pressure on failure and post-failure behavior of Westerley granite[J].Mechanics of Materials,1982(1):3-17. [2] 徐燕萍,刘泉声,徐锡昌.温度作用下的岩石热弹塑性本构方程的研究[J].辽宁工程技术大学学报(自然科学版),2001,20(4):527-529. [3] 郤保平,赵阳升,万志军,等.热力耦合作用下花岗岩流变模型的本构关系研究[J].岩石力学与工程学报,2009,28(5):957-967. [4] LAU J S O. The effects of temperature and water-saturation on mechanical properties of Lac du Bonnet pink granite[R].Tokyo:[s.n.],1995:315-321. [5] 孙天泽.高温条件下岩石力学性质的温度效应[J].地球物理学进展,1996,11(4):36-39. [6] 夏才初,周舒威,胡永生,等.循环单轴应力和循环温度作用下玄武岩力学性质初探[J].岩土力学学报,2015,37(6):1016-1024. [7] 王崇革,刘泉声,刘双跃,等.单轴应力下岩石的热-粘弹性模型研究[J].岩石力学与工程学报,2002,21(S1):2341-2344. [8] 谭云亮,宁建国,赵同斌,等.深部巷道围岩破坏及控制[M].北京:煤炭工业出版社,2010:120-143.
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