河北地质大学学报

为了定量评估钱营孜矿断裂结构的复杂程度，揭示其与煤层赋存的关系，解决传统定性方法难以有效刻画断裂系统非线性特征的难题。基于分形几何理论，运用计盒维数方法对钱营孜煤矿裂隙系统进行全局、分方向、分段分形维数的计算，并研究分形维数与煤层厚度、瓦斯含量等赋存条件的耦合关系，以及顶板岩石断裂面的分形特性。研究表明：钱营孜煤矿的断裂体系在0.25～4 km尺度上呈明显的分形特征，其总体分形维数为1.654 8，并呈现出明显的空间分带性，高维数区以主要断裂和构造节点为主；断裂分形维数与煤厚变异性之间存在着显著的正相关关系，高维数区与煤厚陡变区域相对应；断裂分形维数与瓦斯含量呈负相关，基于分区分形维数将矿井划分为简单、中等、复杂3个构造等级；顶板岩石断裂面分维值随着深度的增加而增大。断裂分形维数较好地反映了断层分布与煤层赋存状态的关系，本研究也可为相似地质条件的同类矿区的构造定量化评价提供参考。

In order to quantitatively assess the complexity of the fault structures in the Qianyingzi Mine， reveal their relationship with coal seam occurrences， and address the difficulty of effectively characterizing the nonlinear features of fault systems through traditional qualitative methods， this study applies fractal geometry theory. Using the box-counting dimension method， the fracture system of the Qianyingzi Coal Mine was analyzed to calculate global， directional， and segmental fractal dimensions， and the coupling relationship between the fractal dimension and occurrence conditions such as coal seam thickness and gas content was investigated， along with the fractal characteristics of roof rock fracture surfaces. The study shows that: the fracture system in Qianyingzi Coal Mine exhibits obvious fractal characteristics at scales of 0.25～4 km， with an overall fractal dimension of 1.654 8， and distinct spatial zoning， where high-dimension areas are mainly associated with major faults and structural nodes; there is a significant positive correlation between fracture fractal dimension and coal thickness variability， with high-dimension areas corresponding to regions of abrupt coal thickness changes; fracture fractal dimension is negatively correlated with gas content， and based on zonal fractal dimensions， the mine was divided into three structural levels: simple， moderate， and complex; the fractal dimension of roof rock fracture surfaces increases with depth. Fracture fractal dimension effectively reflects the relationship between fault distribution and coal seam occurrence， and this study can also provide a reference for the quantitative structural evaluation of similar mines under comparable geological conditions.