承压水底板突水失稳过程的数值模型初探  

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

作　　者：杨天鸿[1] 唐春安[1] 刘红元[1] 朱万成[1] 冯启言[2] 

机构地区：[1]东北大学,辽宁沈阳110006 [2]中国矿业大学,江苏徐州221008

出　　处：《地质力学学报》2003年第3期281-288,共8页Journal of Geomechanics

基　　金：国家自然科学基金资助(50204003)

摘　　要：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 RFPA2D,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 RFPA2D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。In this paper the instability-failure process of floor due to confined water inrush is numerically simulated by using the Coupling Syst em 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 t he fluid pressure transmission during the rupture-failure process of material i s 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 as sociated with the confined aquifer is analyzed and the position where water inru s h 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 devel oped numerical simulation code,can be used to study water inrush from the confin ed aquifer through the floor.

关 键 词：底板突水 数值模拟 破裂失稳过程 渗流 应力耦合 

分 类 号：P554[天文地球—构造地质学]