指出了分维值是用来定量描述自相似的参数，能够定量评价煤层断裂网络复杂程度。利用分维值对口孜东81煤层复杂程度进行了综合评价，根据复杂程度分为四类，得出其断裂构造具有自相似性，比较客观地反映了81煤层断裂构造的复杂程度。%Fractal dimension is used to quantitatively describe the self -similar parameter and it can quantitatively evaluate the complexity degree of fracture network in coal seam .This article uses the fractal dimension value to conduct a comprehensive evaluation of the complexity degree of No .81 coal seam in KuZiDong .According to the complexity degree ,four categories are divided .The results indicate that the fracture structure has the feature of self-similar ,which objectively reflects the complexity degree of the No 81 coal seam's fracture structure .
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