求翻译：图8是溶洞周围的塑性区分布图，从图中可以看出，基础和溶洞周围产生的塑性区范围较大，已贯穿至上伏粉质粘土层，由此可见溶洞已经处于不稳定状态。是什么意思？

Figure 8 is a cave around the plastic zone maps can be seen from the figure, the plastic around the base and cave area, throughout the first V silty clay layer, we can see that the cave has been in an unstable state.

Figure 8 is a karst cave of the plastic area around map, as you can see in the figure, and the Foundation and caves surrounding the plastic zone is a large range, across to previous v powder quality clay layer, it can be seen caverns have been in an unstable state.

Figure 8 is around the limestone cave plastic discrimination butut, may see from the chart, around the foundation and the limestone cave produces the plastic area scope is big, has passed through bends down supremely the silty clay level, thus it can be seen the limestone cave already was at the non

Figure 8 is a plastic zone around the cave map, as can be seen from the figure, basis and have a large range of plastic zone around the caves, has been through the first Volt silty clay layer, it can be seen that cave is already in a precarious state.

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