stability of the surrounding rockmass的用法和樣例：
例句
- The surrounding rocks of arched roadways are much more stable than that of rectangular roadways.
圓弧拱巷道圍岩穩定性要遠大於矩形巷道。 - Considering the problems of old models of drift surroundings stability classification, this paper offers a new one.
在分析以往一些巷道圍岩穩定性分類模型存在的不足之處的基礎上，給出了一種新的模型。
