Abstract : The buried depth of karst paleo-caves in Tahe oilfield, Tarim basin is deeper than others throughout the world. But little is known about the reason why it did not collapse.

摘要 ：塔河油田奥陶系古岩溶洞穴埋藏深度之大在世界范围内罕见，但对其为何没有垮塌殆尽的原因却知之甚少。

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For the same collapse type, the larger the buried depth is, the larger the changing amplitude of the stress of surrounding rock is.

对同一类型的塌方，隧道埋深越大，塌方后隧道周边应力变化幅度越大。

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For the same collapse type, the larger the buried depth is, the larger the changing amplitude of the stress of surrounding rock is.

对同一类型的塌方，隧道埋深越大，塌方后隧道周边应力变化幅度越大。

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