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地下工程开挖时常出现围岩稳定性问题[1],而研究围岩稳定性问题的关键之一是围岩开挖后的二次应力-形变场研究。由于受诸多不确定因素的影响,对此问题的认识和研究面临一定难题。工程实践证明,借助三维数值模拟方法来研究这一问题具有较好效果。
The stability of surrounding rock often appears in excavation of underground engineering [1]. One of the keys to study the stability of surrounding rock is secondary stress-strain field research after excavation of surrounding rock. Due to the influence of many uncertainties, the understanding and research on this issue are facing some difficulties. Engineering practice proves that using the three-dimensional numerical simulation method to study this problem has a good effect.