以临界土洞为界，岩溶塌陷的整个发育形成过程从时间和空间上划分为内部塌陷和地表塌陷两个密不可分的阶段。

In time and space, the whole process of karst collapse can be divided into two phases: inter collapse and surface collapse in term of the formation of the critical soil hole.

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以临界土洞为界，岩溶塌陷的整个发育形成过程从时间和空间上划分为内部塌陷和地表塌陷两个密不可分的阶段。

In time and space, the whole process of karst collapse can be divided into two phases: inter collapse and surface collapse in term of the formation of the critical soil hole.

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