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引用次数: 1

摘要

孔隙连通性是影响煤层渗透率的主要因素。本文对盲煤样和贫煤样的孔隙结构进行了实验,采用无损检测设备“微ct实验系统”对煤样进行扫描,该系统的最小扫描单元分辨率为0.5 μ Ìm。基于微ct图像,利用自行开发的软件对三维数字煤样进行重构,通过图像分割、二值化,再现煤样孔隙簇的三维空间分布,并分析煤样孔隙簇的连通性。实验结果表明:影响瓦斯抽采效率的主要因素是最大孔隙簇中包含的孔隙数量。
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Study on the Connectivity of Pore Structure of Coal in Three-Dimensional Space
The connectivity of pore is main factor which affect the permeability of coal seam. In this paper, we perform an experiment on the pore structure in blind coal sample and lean coal sample, a non-destructive inspection equipment ¡°micro-CT experimental system¡± is used to scan coal samples, the least scanning unit resolution of the system is 0.5¦Ìm. Based on the micro-CT images, the 3D digital sample of coal is reconstructed by using the software developed by author, by images segmentation, binarization, reappeared the distribution of pore cluster in three-dimension space, and analyzed the connectivity of pore cluster in coal sample. The experimental result indicated: the major factor influencing on gas drainage efficiency is amount of pores included in the largest pore cluster.
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