Fractal dimension and fractal assessment index of karst were calculated, and they were used to evaluate karst development degree.

计算了岩溶元的分形生长维数和岩溶发育的分形评价指数，据此对岩溶发育程度进行判别。

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It is indicated that the characteristics of overburden layer, development degree of karst and activities of groundwater have important influence on the formation of karst collapse.

结果表明，覆盖层特征、岩溶发育程度、地下水等对岩溶塌陷的产生有着重要影响。

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