基于CT扫描的煤矿排土场土壤孔隙三维多重分形特征

发布时间：2018-04-21 11:32

本文选题：土地复垦 + CT扫描　；参考：《土壤通报》2017年04期

【摘要】：土壤孔隙对水分、养分的运移起着重要作用,重构土壤孔隙状况反映着复垦土壤质量的高低。本研究基于Math Works Matlab(2009a)平台,在对土壤孔隙CT扫描图片三维重建的基础上,运用多重分形理论对安太堡露天煤矿不同复垦年限排土场重构土壤(23年、20年、0年)以及原地貌土壤进行三维多重分形定量表征,以探讨重构土壤孔隙空间分布规律。结果表明:重构土壤孔隙三维结构具有多重分形特征,信息熵维D1、广义维数谱曲线弯曲程度△D、多重分形谱谱宽△α随着复垦年限逐渐增大,土壤孔隙状况得到改善,土壤孔隙分布越趋于复杂,变异程度较高;重构土壤及原地貌土壤孔隙三维分布多重分形谱函数△f0,呈左钩状,大概率孔隙占主要地位,孔隙分布不均匀。多重分形参数D1、D0-D1、△D、△α、△f间具有较好的相关性,从不同角度上反映了土壤孔隙三维分布的非均质性。
[Abstract]:Soil porosity plays an important role in the movement of water and nutrients, and the reconstruction of soil porosity reflects the quality of reclaimed soil. Based on the Math Works Matlab 2009a platform, this study was based on the 3D reconstruction of soil pore CT images. Using the multifractal theory, the three-dimensional multifractal quantitative characterization of the reconstructed soil (23 years, 20 years, 20 years) and the original geomorphological soil was carried out at the dump of different reclamation years in Antaibao opencast coal mine, in order to explore the spatial distribution law of the reconstructed soil pore space. The results showed that the reconstructed soil pore 3D structure had multifractal characteristics, the information entropy dimension D 1, the generalized dimension spectrum curve bending degree D, the multifractal spectrum width 伪 gradually increased with the reclamation years, the soil pore condition was improved. The distribution of soil pores tends to be more complex and the degree of variation is higher. The three-dimensional multifractal spectrum function f _ 0 of reconstructing soil and original geomorphologic soil pore is left hook shape and large probability pore occupies the main position and the pore distribution is not uniform. The multifractal parameters D _ (1) D _ (0) D _ (1), D _ (0) D _ (1), D _ (伪) and (f) had good correlation, which reflected the heterogeneity of soil pore distribution from different angles.
【作者单位】：中国地质大学(北京)土地科学技术学院;国土资源部土地整治重点实验室;
【基金】：国家自然科学基金(41271528) 山西省自然科学基金项目(2014011034-1)资助
【分类号】：S152.5

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