基于分形理论的皖北矿区断裂复杂程度分析

Analysis of Fracture Complexity in Northern Anhui Mining Area Based on Fractal Theory

根据分形理论,通过皖北矿区断裂网络的相似维数对其断裂复杂程度加以解释和分析。结果显示皖北矿区构造复杂区域较为集中,分维值较高。区域内的断裂构造具有较为明显的区域性,大小断层裂隙集中发育的密集区域其整体分维值下限大于1,构造复杂。其相似维评价结果与实际揭露基本吻合,评价结果较好。在评价中合理应用断裂网络的相似维值能对断裂构造的复杂程度做出较好的解释,可作为一种比较准确、有效的评价指标应用于断裂复杂程度的评价。

According to the fractal theory, the fracture complexity of northern Anhui mining area is explained and analyzed by the similar dimension values of the fracture network. The results show that the complex tectonic area in northern Anhui is relatively concentrated and the fractal dimension value is high. The faults in the region are obviously regional. The lower limit of integral fractal dimension is more than 1 in the densely developed areas with large and small faults and fractures, and the structure is complicated. Similar dimension evaluation results are basically consistent with the actual exposure, and the evaluation results are better. Reasonable application of similar dimension value of fracture network in evaluation can better explain the complexity of fracture structure and can be used as a more accurate and effective evaluation index to evaluate the complexity of fracture.