岩溶隧道与下部溶洞间安全距离预测模型研究

为了完善现有的岩溶隧道与溶洞间安全距离预测模型，在已有的二维预测模型基础上，利用正交试验和数值模拟方法，同时对数值试验结果进行多元线性回归分析，得到包括溶洞空间形态在内的多因素共同作用下的岩溶隧道安全距离三维预测模型。该模型能够定量地预测隧道埋深、围岩水平、溶洞跨度、水平方向夹角及溶洞高跨比5个因子对隧道底板与下方溶洞之间所需安全距离的影响，进而预测所需的安全距离。最后将该预测模型用于实际工程，其结果与现场实际采用的安全距离差别不大，从而说明该模型具有一定的可靠性。

Study on Model to Predict the Safe Distance Between Karst Tunnels and Karst Caves Underneath

In this paper,numerical simulation and orthogonal experiment are carried out to study the safe distance between karst tunnels and karst caves.To perfect the model to predict the safe distance between karst tunnels and karst caves underneath,the authors develop a 3D model,which predicts the safe distance based on the following five factors：the depth of the tunnel,the level of the surrounding rock,the span of the karst cave,the base angle,and the ratio between the height and the span of the cave.The 3 D model has been trialed in actual projects and the prediction results turn out to be very close to the space distance that was adopted,therefore proving the reliability of the model.