Abstract: The granule structure and particle size gradation curves of each rock were obtained by sieving rock particles such as sandstone, argillaceous siltstone, silty mudstone, and mudstone in Xigeda strata. The fractal dimensions of rocks in the Xigeda formation were determined using the fractal theory. The dimensions coefficients and the non-uniformity coefficients Cu, the coefficients of curvature Cc, and the water content of the fillers were established ω(%), dry density ρd(g/cm3). The results show that there is a good correlation between the fractal dimension of the particles and the engineering performance of the filler. Therefore, the engineering suitability of the filler can be determined by the fractal dimension of the filler particles.

Key words: geotechnical engineering, Xigeda formation, particle composition, fractal characteristics, suitability

摘要： 通过对昔格达地层中砂岩、泥质粉砂岩、粉砂质泥岩和泥岩等岩类颗粒的筛分试验，获得了各岩类的粒组结构及粒径级配曲线，分析发现各岩类颗粒组成具有明显的分形特征，运用分形理论，确定了昔格达地层中各岩类的分形维数，并建立了维数与表征填料工程性质的不均匀系数Cu、曲率系数Cc及含水量ω(%)、干密度ρd(g/cm3)等指标的相关性，研究表明颗粒分形维数与填料工程性能之间具有较好的相关关系。因此，可以借助填料颗粒组成的分形维数来判定填料的工程适宜性。

关键词: 岩土工程, 昔格达地层, 颗粒组成, 分形特征, 适宜性