With the decline of the stability of surrounding rock, the ground subsidence and the vault settlement increase gradually.

随着围岩稳定性由好变坏，地表沉降和拱顶下沉值也呈逐渐增大的趋势；

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So far, there is no method by which the stability of the surrounding ground can be effectively evaluated.

目前，还没有一套评价岩体工程稳定性的行之有效的方法。

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So far, there is no method by which the stability of the surrounding ground can be effectively evaluated.

目前，还没有一套评价岩体工程稳定性的行之有效的方法。

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