承压水底板突水失稳过程的数值模型初探

利用自行开发的岩石破裂过程渗流与应力耦合分析系统F-RFPA^20，对承压水底板破裂失稳过程进行了数值模拟。在这个数值模型中，材料在开裂破坏过程中流体压力传递通过单元渗流．损伤耦合迭代来实现。根据模拟结果，分析了承压水底板失稳的机理，对承压水底板的突水部位的预测进行了探讨。得出了与实际基本一致的结果，说明了F-RFPA^20。作为一种新的数值模拟方法，可以用来研究承压水底板突水问题。

NUMERICAL MODEL OF THE INSTABILITY-FAILURE PROCESS OF THE COAL-BED FLOOR DUE TO CONFINED WATER INRUSH

In this paper the instability-failure process of floor due to confined water inrush is numerically simulated by using the Coupling System of Flow & Solid in Rock Failure Process Analysis(F-FRPA^2D) that has be en recently developed by CRISR,Northeastern University.In this numerical model the fluid pressure transmission during the rupture-failure process of material is achieved by the coupling and iteration of flow-damage of an element.According to the results of the simulation the instability-failure mechanism of floor associated with the confined aquifer is analyzed and the position where water inrush is liable to happen is predicted.The results are in the main consistent with t he phenomena at the site,which indicates that the F-RFPA^2D,as a newly developed numerical simulation code,can be used to study water inrush from the confin ed aquifer through the floor.