摘要
为研究溶液浸泡对红砂岩孔隙度和分形维数的影响,将红砂岩样放入新配溶液中浸泡,拍摄浸泡后各岩样的扫描电镜图像,应用一种加入梯度信息的水平集图像分割方法对扫描电镜图像进行图像分割,并对分割后的图像进行二值化处理,进行孔隙度计算与微观孔隙结构研究,实验测定各红砂岩样的孔隙度。结果表明:红砂岩微观孔隙结构具有分形特征,溶液浸泡后红砂岩分形维数略有变大;溶液浸泡后的红砂岩孔隙度变大;红砂岩的计算孔隙度值与实测孔隙度值符合度较高;红砂岩的孔隙度和分形维数随浸泡时间的增加略有变大,浸泡到30 d时趋于稳定;浸泡盐溶液种类对红砂岩孔隙度及分形维数的影响程度排序为氯化镁>氯化钠>碳酸氢钠。
In order to investigate influence of solution soak on porosity and fractal dimensions of red sandstone.A method of image segmentation with grads information added is applied to segment SEM images of the red sandstone,then the binarization of segmented images is implemented. The porosity of the red sandstone is derived and the structure of micro pores is studied. The results show that microscopic pore structure of the red sandstone is fractal. The calculated porosity are agreed well with the experimental data. The porosity and fractal dimensions of red sandstone increase slightly as soak time growing up,and finally tend to be stable when the soaking time approaches 30 days. The influence degree of different salt solutions on porosity and fractal dimensions of the red sandstone is as follows: magnesium chloride > sodium chloride > sodium chloride.
出处
《河南理工大学学报（自然科学版）》
CAS
北大核心
2018年第2期150-156,共7页
Journal of Henan Polytechnic University（Natural Science）
基金
国家自然科学基金资助项目(91230114)
关键词
红砂岩
盐溶液
浸泡时间
孔隙度
分形维数
red sandstone
saline solution
soak time
porosity
fractal dimensions
