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中文摘要：
借助ABAQUS软件的前后处理和计算模块，根据地下洞室开挖释放荷载计算基本原理求得开挖荷载的等效节点力，并以等效节点力不同的施加比例模拟不同的洞室支护时机，对洞室围岩稳定进行了分析比较．结果表明，随着支护时间的延迟，支护应力逐渐变小，围岩塑性区和增量位移逐渐增大．计算结果符合地下工程施工过程的一般规律，表明该方法可行，为通用有限元软件在地下洞室围岩稳定分析中应用开辟了一条新的路径．
英文摘要：
The CAE and visualisation module of ABAQUS are used and the secondary program is developed. And the excavation loads are calculated with the basic theory and the nodes＇ forces are carried out. Then the different support schedules are simulated with the corresponding forces applied in certain percent; and the surrounding rock stability is analyzed. The result shows that support stress becomes less and the displacement and rock plastic zone becomes larger with the support time later. And the analysis methods and technical routine is verified. A new method to analyze the rock stability by the commercial software is developed.
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