[1]杨玉茹,李文平,王启庆.上新世红土微观结构参数与渗透系数的变化关系研究[J].水文地质工程地质,2020,47(2):153-160.[doi:10.16030/j.cnki.issn.1000-3665.201905074]
 YANG Yuru,LI Wenping,WANG Qiqing.A study of the relationship between the coefficient of permeability and microstructure of the Pliocene laterite[J].Hydrogeology & Engineering Geology,2020,47(2):153-160.[doi:10.16030/j.cnki.issn.1000-3665.201905074]
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上新世红土微观结构参数与渗透系数的变化关系研究()
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《水文地质工程地质》[ISSN:1000-3665/CN:11-2202/P]

卷:
47卷
期数:
2020年2期
页码:
153-160
栏目:
环境地质
出版日期:
2020-03-15

文章信息/Info

Title:
A study of the relationship between the coefficient of permeability and microstructure of the Pliocene laterite
文章编号:
1000-3665(2020)02-0153-08
作者:
杨玉茹李文平王启庆
中国矿业大学资源与地球科学学院,江苏 徐州221116
Author(s):
YANG Yuru LI Wenping WANG Qiqing
School of Resources and Geosciences, China University of Mining and Technology, Xuzhou, Jiangsu221116, China
关键词:
上新世红土微观结构图像处理渗透系数定量分析
Keywords:
Pliocene laterite microstructure image processing coefficient of permeability quantitative analysis
分类号:
P642.13+2
DOI:
10.16030/j.cnki.issn.1000-3665.201905074
文献标志码:
A
摘要:
新近系上新世(N2)红土是实现我国西北地区保水采煤和生态环境保护的关键隔水层,研究红土的微观结构有利于分析其渗透性变化的内在机理。文章利用Matlab对不同渗透系数的N2红土的SEM图像进行了预处理和二值化分割,提取孔隙轮廓,得到其孔隙大小、排列、形态和类型等微观特征,并分析了红土的灰度熵、平均孔径、扁圆度、分布分维和概率熵等孔隙微观结构参数与渗透系数之间的关系。结果表明:图像灰度熵与渗透系数之间无明显变化规律,灰度熵在0.88~0.92之间;平均孔径在2.7~3.7 μm之间,渗透系数随平均孔径的增加呈指数型增加;对孔隙大小按照微孔隙(<1 μm)、小孔隙(1~4 μm)、中孔隙(4~16 μm)、大孔隙(>16 μm)4组进行分类,发现小孔隙的数量最多,约占总孔隙数的50%以上,中孔隙和大孔隙的面积约占总孔隙面积的80%以上,渗透系数的增大主要与中孔隙和大孔隙有关;孔隙扁圆度在0.54~0.57之间,形状系数在0.63~0.75之间,孔隙主要呈扁椭圆状,渗透系数随扁圆度的增加呈指数型缓慢减小,随形状系数的增加呈线性减小;孔隙的分布分维数在1.00~1.40之间,随着分布分维的增加,孔隙由大变小,渗透系数随之呈指数型减小;不同土样的概率熵在0.97~0.99之间,孔隙缺乏明显定向性。
Abstract:
Pliocene (N2) laterite is the key aquifer soil to actualize the coal mining with water protection and ecological environment protection in northwest China. Examination of the microstructure of laterite is helpful in analyzing the internal mechanism of the permeability change. In this paper, the SEM images of N2 laterite with different permeability are preprocessed and binarized by using Matlab. The pore profile is obtained to get the micro-characteristics such as pore size, arrangement, shape, type, etc. The relationship between the coefficient of permeability of laterite and pore microstructure parameters such as the gray entropy, average aperture, oblateness, distribution fractal dimension and probability entropy are analyzed. The results show that there is no obvious relationship between the gray entropy and the coefficient of permeability, and the gray entropy ranges between 0.88 and 0.92. The average aperture is between 2.7 μm and 3.7 μm, and the coefficient of permeability increases exponentially with the increasing average aperture. The pore are classified as four groups of micro pore (<1 μm),small micro pore (1~4 μm),medium micro pore (4~16 μm) and large micro pore (>16 μm). It is found that the increase in the coefficient of permeability is mainly related to medium and large pore sizes. The oblateness varies between 0.54 and 0.57, the shape coefficient is between 0.63 and 0.75, and the pores are mainly oblate. The coefficient of permeability decreases exponentially with the increasing flatness, and decreases linearly with the increasing shape coefficient. The distribution fractal dimension of the pores ranges from 1.00 to 1.40. With the increasing distribution fractal dimension, the pores become smaller, and the coefficient of permeability decreases exponentially. The probability entropy ranges from 0.97 to 0.99. Pore arrangement is confusing and lacks obvious directionality.

参考文献/References:

[1]黄庆享.浅埋煤层保水开采隔水层稳定性的模拟研究[J]. 岩石力学与工程学报,2009,28(5):987-992.
[HUANG Q X. Simulation of clay aquifuge stability of water conservation mining in shallow-buried coal seam[J]. Chinese Journal of Rock Mechanics and Engineering, 2009,28(5):987-992.(in Chinese)]
[2]曲永新,张永双,覃祖淼.三趾马红土与西北黄土高原滑坡[J].工程地质学报,1999,7(3):257-265.
[QU Y X, ZHANG Y S, QIN Z M. Hipparion laterite and landslide hazards on loess plateau of northwestern China[J].Journal of Engineering Geology, 1999,7(3):257-265.(in Chinese)]
[3]阴静慧,李文平,王启庆.晋中南上新世红土物理性质及成因分析[C]//中国地质学会工程地质专业委员会.2016年全国工程地质学术年会论文集.北京:《工程地质学报》编辑部,2016:1201-1205.
[YIN J H, LI W P, WANG Q Q. Physical properties and genesis analysis of laterite in the middle and southern Shanxi province[C]//Engineering Geology Committee of China Geological Society. Papers of the 2016 National Academic Conference on Engineering Geology. Beijing: Editorial Department of Journal of Engineering Geology, 2016:1201-1205.(in Chinese)]
[4]李涛,李文平,常金源,等.陕北浅埋煤层开采隔水土层渗透性变化特征[J].采矿与安全工程报,2011,28(1): 127-131.
[LI T, LI W P, CHANG J Y, et al. Permeability features of water-resistant clay layer in northern Shaanxi province while shallowly buried coal mining[J].Journal of Mining & Safety Engineering, 2011,28(1):127-131.(in Chinese)]
[5]王启庆,李文平,裴亚兵,等.釆动破裂N2红土渗透性试验研究[J].西南交通大学学报,2019,54(1):91-96.
[WANG Q Q, LI W P, PEI Y B, et al. Experimental study on permeability of mining-cracked N2 laterite[J]. Journal of Southwest Jiaotong University, 2019,54(1):91-96.(in Chinese)]
[6]李文平,王启庆,李小琴.隔水层再造——西北保水采煤关键隔水层N2红土工程地质研究[J].煤炭学报, 2017,42(1):88-97.
[LI W P, WANG Q Q, LI X Q. Reconstruction of aquifuge: the engineering geological study of N2 laterite located in key aquifuge concerning coal mining with water protection in northwest China[J].Journal of China Coal Society, 2017,42(1):88-97.(in Chinese)]
[7]李向全,胡瑞林,张莉.软土固结过程中的微结构变化特征[J].地学前缘,2000,7(1):147-152.
[LI X Q, HU R L, ZHANG L. The variation of microstructure during soft soil solidification[J].Earth Science Frontiers, 2000,7 (1):147-152.(in Chinese)]
[8]沈珠江.土体结构性的数学模型——21世纪土力学的核心问题[J].岩土工程学报,1996,18(1):95-97.
[SHEN Z J. Mathematical model of soil structure—the core problems of soil mechanics in the 21st century[J].Chinese Journal of Geotechnical Engineering, 1996,18(1):95-97.(in Chinese)]
[9]杨爱武,吴可龙,周玉明,等.小偏应力作用下吹填土蠕变过程中微结构特征演变研究[J].水文地质工程地质,2015,42(2):89-96.
[YANG A W, WU K L, ZHOU Y M, et al. A study of the microstructure characteristics evolution of dredger fill in the process of creep[J]. Hydrogeology & Engineering Geology, 2015,42(2):89-96.(in Chinese)]
[10]吴凯,倪万魁,刘海松,等.压实黄土强度特性与微观结构变化关系研究[J].水文地质工程地质,2016,43(5):62-69.
[WU K, NI W K, LIU H S, et al. Research on the relationships between the strength properties of compacted loess and microstructural changes[J]. Hydrogeology & Engineering Geology, 2016,43(5):62-69.(in Chinese)]
[11]侯超群,席瑶,孙志彬,等.基于IPP图像处理的膨胀土微观结构定量研究[J].水文地质工程地质,2019,46(2): 156-161.
[HOU C Q, XI Y, SUN Z B, et al. A quantitative study of microstructure of expansive soil based on IPP image processing[J].Hydrogeology & Engineering Geology, 2019,46(2):156-161.(in Chinese)]
[12]李喜安,刘锦阳,郭泽泽,等.马兰黄土孔隙结构参数与渗透性关系研究[J].工程地质学报,2018,26(6):1415-1423.
[LI X A, LIU J Y, et al. Study on relationship between pore structure parameters and permeability of Malan loess[J].Journal of Engineering Geology, 2018,26(6): 1415-1423.(in Chinese)]
[13]胡瑞林,李向全,官国琳,等.粘性土微结构定量模型及其工程地质特征研究[M].北京:地质出版社,1995:15-17.
[HU R L, LI X Q, GUAN G L, et al. Quantitative Microstructure models of clayey soils and their engineering behaviors[M].Beijing: Geological Publishing House, 1995:15-17.(in Chinese)]
[14]毛灵涛,薛茹,安里千. MATLAB在微观结构SEM图像定量分析中的应用[J].电子显微学报,2004,23(5): 579-583.
[MAO L T, XU R, AN L Q. Quantitative analysis on SEM image of microstructure with MATLAB[J].Journal of Chinese Electron Microscopy Society, 2004,23(5):579-583.(in Chinese)]
[15]苗得雨,白晓红.基于Matlab的土体SEM图像处理方法[J].水文地质工程地质,2014,41(6):141-146.
[MIAO D Y, BAI X H. Microstructure of soil using SEM images based on Matlab[J].Hydrogeology & Engineering Geology, 2014,41(6):141-146.(in Chinese)]
[16]谷天峰,王家鼎,郭乐,等.基于图像处理的Q3黄土的微观结构变化研究[J].岩石力学与工程学报, 2011,30(增刊1):3185-3192.
[GU T F, WANG J D, GUO L, et al. Study of Q3 loess microstructure changes based on image processing[J].Chinese Journal of Rock Mechanics and Engineering, 2011,30(Sup1):3185-3192.(in Chinese)]
[17]汤强,刘春,顾颖凡,等.土体SEM图像微观结构的识别和统计方法[J].桂林理工大学学报,2017,37(3):547-552.
[TANG Q, LIU C, GU Y F, et al. Microstructure identification and statistical method of the soil SEM image[J].Journal of Guilin University of Technology, 2017,37(3):547-552.(in Chinese)]
[18]周阳.黄土微结构数字图像处理与定量化方法的研究[D].西安:西安科技大学,2013.
[ZHOU Y. Study on the digital image processing and quantification technologies of loess microstructure[D].Xi’an: Xi’an University of Science and Technology, 2013.(in Chinese)]
[19]方祥位,申春妮,李春海,等.陕西蒲城黄土微观结构特征及定量分析[J].岩石力学与工程学报,2013,32(9):1917-1925.
[FANG X W, SHEN C N, LI C H, et al. Quantitative analysis of microstructure characteristics of Pucheng loess in Shaanxi province[J].Chinese Journal of Rock Mechanics and Engineering, 2013,32(9):1917-1925.(in Chinese)]
[20]施斌.粘性土击实过程中微观结构的定量评价[J].岩土工程学报,1996,18(4):57-62.
[SHI B. Quantitative assessment of changes of microstructure for clayey soil in the process of compaction[J].Chinese Journal of Geotechnical Engineering, 1996,18(4):57-62.(in Chinese)]
[21]雷祥义.中国黄土的孔隙类型与湿陷性[J].中国科学,1987,17(12):1309-1318.
[LEI X Y. Pore types and collapsibility of loess in China[J].Science in China, 1987,17(12):1309-1318.(in Chinese)

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备注/Memo

备注/Memo:
收稿日期: 2019-05-30; 修订日期: 2019-08-29
基金项目: ( 国家自然科学基金重点项目资助(41430643)?
第一作者: (杨玉茹(1995-),女,硕士研究生,主要进行工程地质方面的研究。E-mail: yangyuru@cumt.edu.cn )
通讯作者: HT5”SS李文平(1965-),男,教授,博士生导师,研究方向为煤矿工程地质与水文地质。E-mail: wpli1688@126.com
更新日期/Last Update: 2020-03-15