The stability of underground water-sealed oil storage caverns is of great importance for safe excavation and operation. To analyze the scope of the failure zone and underground cavern stability accurately, a new method was developed that integrates the rock tunneling quality index Q-system and stability graph method with 3D laser scanning and numerical simulation. The point cloud data were obtained by 3D laser scanning, and the cavern model was built by using DIMINE software, which directly shows the 3D shape of the cavern. The rock mass physical and mechanical parameters and the corresponding stability coefficients were obtained based on Q-system and stability graph method. The plastic zone distribution and deformation characteristics of surrounding rock were analyzed through numerical simulation. Then, the corresponding relationship between caving zone and plastic zone was determined by comparing the numerical simulation results with the 3D laser scanning contour. The new method provides a reliable way to analyze the stability of the underground water-sealed oil storage cavern and also will helpful to design or optimize the subsequent support.

中文翻译：

---

我国地下水封储油洞室稳定性分析：案例研究

地下水封储油洞室的稳定性对安全开挖和作业具有重要意义。为准确分析破坏带的范围和地下洞室的稳定性，开发了一种将岩石隧道质量指标Q系统和稳定性图法与3D激光扫描和数值模拟相结合的新方法。通过3D激光扫描获取点云数据，利用DIMINE软件建立洞穴模型，直接展示洞穴的3D形态。基于Q系统和稳定性图法得到岩体物理力学参数及相应的稳定性系数。通过数值模拟分析了围岩塑性区分布及变形特征。然后，通过将数值模拟结果与3D激光扫描轮廓进行比较，确定崩落区与塑性区的对应关系。新方法为分析地下水封储油洞室的稳定性提供了一种可靠的方法，也有助于后续支护的设计或优化。