【作者】 王仁； 吴海青； 孙荀英；

【Author】 Wang Ren Wu Haiqing~①Sun Xunying (Peking University)

【机构】 北京大学；

【摘要】 开挖复杂岩层中的巷道,往往出现测向膨胀、冒顶或底鼓现象,巷道位移随时间变化,具有明显的流动性。因此,研究巷道变形时应将围岩当作流变体,方能解释其时间效应。本文继采用牛顿粘性流体有限元反演计算巷道的变形规律之后,又用缓慢流动的Maxwell流体有限元方法分析同一巷道的变形规律。更多还原

【Abstract】 The finite element method for viscoelastic fluid is introduced in this paper.The initial stress rate method to solve the dispersed equations of the finite element is also presented in detail.In order to fit the calculated values with the measured values,we use the orthogonal design method to optimize the boundary forces and the mechanical parameters of surrounding rock.Finally, the variations of the velocity and the stress field with time are obtained.According to the velocity and the stress values,we can get the range of the slack circle and the dangerous area.更多还原