【作者】 杨彩红；

【导师】 王永岩；

【作者基本信息】 辽宁工程技术大学 ， 工程力学， 2005， 硕士

【摘要】 随着煤炭开采不断加深,围岩随着时间的增长而产生显著的蠕变现象,使得矿井巷道的掘进、支护与维护问题越来越突出。其中,水的作用使得围岩的结构和力学性能恶化、实际载荷高于表观载荷而使由高地应力引起的岩体的流变变形大大增加,给矿井的安全生产带来了极大的威胁。同时,对其反复支护又造成了巨大的经济损失。针对隧道开挖后因渗流路径的增加而改变围岩的含水状态,使围岩的蠕变变形规律发生改变的现象,本文根据岩土流变力学和渗流力学理论,从微元体的角度对关于水对软岩蠕变性态的影响进行了解释,对水对软岩蠕变变形规律及其本构方程的影响进行了研究,并在此基础上建立了单相流体在蠕变变形多孔介质(均质、各向同性的Bu体软岩)中流动时的固流耦合模型。结果表明固流耦合是软岩蠕变变形非线性的重要影响因素。科学计算作为一种新的手段被广泛地应用在工程各个领域。本文利用Matlab软件对含水率变化的高应力软岩巷道蠕变变形进行了数值计算。从另一个侧面说明了含水率变化对软岩蠕变的影响,并与理论分析相吻合。更多还原

【Abstract】 With the development of coal mining’s depth, the phenomenons of various creep happen according as time increase, the problems of tunnel tunneling, supporting and maintenance are more and more outstanding. Because water deteriorates the wall rock configuration and mechanics performance, make actual stress be bigger than apparent stress, the high ground stress makes the rock deform largely and it threats the safe work seriously. Meanwhile the repeated supporting for tunnels brings about a lot of economic losses. Aiming at the phenomenon that after tunnel is excavated, the water content of engineering wall rock will change because of the increase in paths of groundwater seepage, and the creep laws of engineering wall rocks will also changes, we studied the problem that the change of water content works on the creep deformation law of soft rock and its constitutive equation. And a mathematical modal of solid – fluid coupling of one – phrase fluid flowing in porous media of creep deformation (the medium is material Bu of uniformity, isotropy) was established based on it. The result shows that solid – fluid coupling is an important factor affecting non – linear property of soft rock creep. As a new way, scientific calculation is wildly used in various areas. The creeps of rocks in different water content are calculated by Matlab in this thesis. And the calculation results accord with the theory analysis.更多还原