Study on Microstructure and Elements in the Sandstone of the Shendong Coal Field, Inner Mongolia by SEM-EDX

Hui-gui LI; Hua-min LI; Chang-xing LI; Shan-le CHEN

doi:10.15898/j.cnki.11-2131/td.201705120080

2018 Vol. 37, No. 1

Article Contents

Article navigation > Rock and Mineral Analysis > 2018 > 37(1): 70-78

Next Article Previous Article

Hui-gui LI, Hua-min LI, Chang-xing LI, Shan-le CHEN. Study on Microstructure and Elements in the Sandstone of the Shendong Coal Field, Inner Mongolia by SEM-EDX[J]. Rock and Mineral Analysis, 2018, 37(1): 70-78. doi: 10.15898/j.cnki.11-2131/td.201705120080

Citation:

Hui-gui LI, Hua-min LI, Chang-xing LI, Shan-le CHEN. Study on Microstructure and Elements in the Sandstone of the Shendong Coal Field, Inner Mongolia by SEM-EDX[J]. Rock and Mineral Analysis, 2018, 37(1): 70-78. doi: 10.15898/j.cnki.11-2131/td.201705120080

Study on Microstructure and Elements in the Sandstone of the Shendong Coal Field, Inner Mongolia by SEM-EDX

1.
College of Mining Engineering, Guizhou University of Engineering Science, Bijie 551700, China
2.
School of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, China

Received Date: 12 May 2017

Revised Date: 20 November 2017

Accepted Date: 02 January 2018

Abstract

Abstract

The sandstone strata in the Shendong coal field have lots of structural planes, which has a significant influence on the mechanical properties, ultrasonic wave propagation, failure mode and force transfer of the strata. The structural plane in the sandstone strata of the Buertai, Daliuta, Bulianta mine was chosen as the research object, and their microstructure and element characteristics were studied by using FEI-SEM and Energy Dispersive X-ray Fluorescence Spectrometer (EDXRF). Results show that the structural planes in sandstone of the Shendong coal field can be divided into two types (Ⅰ and Ⅱ), with Ⅰ being further divided into three subgroups (Ⅰ₁, Ⅰ₂, Ⅰ₃). TypeⅠ mainly contains coal, whereas typeⅡ mainly contains muscovite. TypesⅠ₁ and Ⅱ structural plane particles are not obvious and the particle boundaries are not clear. But the particles of typeⅠ₂ and Ⅰ₃ structure planes are more obvious with much clearer particle boundaries. The pore diameter and fracture length of typeⅠ₁ structure plane are 2.1 μm and 81.8 μm, respectively, whereas those for typeⅠ₂ structure plane are 8.9 μm and 38.8 μm, respectively. The pore diameter and fracture length of typeⅠ₃ structure plane are 4.5 μm and 143.7 μm, whereas those for typeⅡ structure plane were 3.8 μm and 13.8 μm, respectively. The main elements of typeⅠ₁ structure plane are C, O, Si, Al, K, Ti and Fe, whereas the main elements of Ⅰ₂ structure plane is C. The main elements of Ⅰ₃ structural plane are C, O, Si, Al, K and Mg. The main elements of typeⅡ structural plane are C, O, Si, Al, K and Ti. Therefore, C and O are the main elements of the structural planes in the strata of the Shendong coal field. The microstructures of the two types of structural planes are different. The results are helpful to further reveal the roof dynamic disaster and step subsidence in the Shendong coal field.
- structural plane /
- microstructure /
- pore /
- element characteristics /
- Shendong coal field

FullText(HTML)

References

[1]	Behrestaghi M H N, Rao K S, Ramamurthy T.Engi-neering geological and geotechnical responses of schistose rocks from dam project areas in India[J].Engineering Geology, 1996, 44(1):183-201. Google Scholar
[2]	Exadaktylos G E, Kaklis K N.Applications of an explicit solution for the transversely isotropic circular disc compressed diametrically[J].International Journal of Rock Mechanics and Mining Sciences, 2001, 38(2):227-243. doi: 10.1016/S1365-1609(00)00072-1 CrossRef Google Scholar
[3]	Gatelier N, Pellet F, Loret B.Mechanical damage of an anisotropic porous rock in cyclic triaxial tests[J].International Journal of Rock Mechanics and Mining Sciences, 2002, 39(3):335-354. doi: 10.1016/S1365-1609(02)00029-1 CrossRef Google Scholar
[4]	周尚文, 薛华庆, 郭伟, 等.基于扫描电镜和X射线能谱的页岩矿物分析方法[J].中国石油勘探, 2017, 22(6):27-33. Google Scholar Zhou S W, Xue H Q, Guo W, et al.A mineral analysis method for shale based on SEM and X-ray EDS[J].China Petroleum Exploration, 2017, 22(6):27-33. Google Scholar
[5]	王满, 王英伟.平顶山矿区煤体微观结构的扫描电镜分析[J].煤矿安全, 2014, 45(7):169-171. Google Scholar Wang M, Wang Y W.SEM analysis of coal microstructure in Pingdianshan mining area[J].Safety in Coal Mines, 2014, 45(7):169-171. Google Scholar
[6]	李长明, 宋丽莎, 王立久, 等.砒砂岩的矿物成分及其抗蚀性[J].中国水土保持科学, 2015, 13(2):11-16. Google Scholar Li C M, Song L S, Wang L J, et al.Mineral composition and anti-erodibility of Pisha sandstone[J].Science of Soil and Water Conservation, 2015, 13(2):11-16. Google Scholar
[7]	王建其, 柳小明.X射线荧光光谱法分析不同类型岩石中10种主量元素的测试能力验证[J].岩矿测试, 2016, 35(2):145-151. Google Scholar Wang J Q, Liu X M.Proficiency testing of the XRF method for measuring 10 major elements in different rock types[J].Rock and Mineral Analysis, 2016, 35(2):145-151. Google Scholar
[8]	赵康, 赵红宇, 贾群燕.岩爆岩石断裂的微观结构形貌分析及岩爆机理[J].爆炸与冲击, 2015, 35(6):913-918. doi: 10.11883/1001-1455(2015)06-0913-06 CrossRef Google Scholar Zhao K, Zhao H Y, Jia Q Y.An analysis of rockburst fracture micromorphology and study of its mechanism[J].Explosion and Shock Waves, 2015, 35(6):913-918. doi: 10.11883/1001-1455(2015)06-0913-06 CrossRef Google Scholar
[9]	杨春和, 冒海军, 王学潮, 等.板岩遇水软化的微观结构及力学特性研究[J].岩土力学, 2006, 27(12):2090-2098. doi: 10.3969/j.issn.1000-7598.2006.12.002 CrossRef Google Scholar Yang C H, Mao H J, Wang X C, et al.Study on variation of microstructure and mechanical properties of water-weakening slates[J].Rock and Soil Mechanics, 2006, 27(12):2090-2098. doi: 10.3969/j.issn.1000-7598.2006.12.002 CrossRef Google Scholar
[10]	石秉忠, 夏柏如.硬脆性泥页岩水化过程的微观结构变化[J].大庆石油学院学报, 2011, 35(6):28-34. Google Scholar Shi B Z, Xia B R.The variation of microstructures in the hard brittle shale hydration process[J].Journal of Daqing Petroleum Institute, 2011, 35(6):28-34. Google Scholar
[11]	时贤, 程远方, 蒋恕, 等.页岩微观结构及岩石力学特征实验研究[J].岩石力学与工程学报, 2014, 33(增刊2):3439-3445. Google Scholar Shi X, Cheng Y F, Jiang S, et al.Experimental study of microstructure and rock properties of shale samples[J].Chinese Journal of Rock Mechanics and Engineering, 2014, 33(Supplement 2):3439-3445. Google Scholar
[12]	薛华庆, 胥蕊娜, 姜培学, 等.岩石微观结构CT扫描表征技术研究[J].力学学报, 2015, 47(6):1073-1078. doi: 10.6052/0459-1879-15-102 CrossRef Google Scholar Xue H Q, Xu R N, Jiang P X, et al.Characterization of rock microstructure using 3D X-ray computed tomography[J].Chinese Journal of Theoretical and Applied Mechanics, 2015, 47(6):1073-1078. doi: 10.6052/0459-1879-15-102 CrossRef Google Scholar
[13]	曹平, 宁果果, 范祥, 等.不同温度的水岩作用对岩石节理表面形貌特征的影响[J].中南大学学报(自然科学版), 2013, 44(4):1510-1516. Google Scholar Cao P, Ning G G, Fan X, et al.Influence of water-rock interaction on morphological characteristic of rock joint surface at different temperatures[J].Journal of Central South University (Science and Technology), 2013, 44(4):1510-1516. Google Scholar
[14]	曹平, 贾洪强, 刘涛影, 等.岩石节理表面三维形貌特征的分形分析[J].岩石力学与工程学报, 2011, 30(增刊2):3839-3843. Google Scholar Cao P, Jia H Q, Liu T Y, et al.Fractal analysis of three-dimensional topography characteristics of rock joint surface[J].Chinese Journal of Rock Mechanics and Engineering, 2011, 30(Supplement 2):3839-3843. Google Scholar
[15]	陈世江, 朱万成, 张敏思, 等.基于数字图像处理技术的岩石节理分形描述[J].岩土工程学报, 2012, 34(11):2087-2092. Google Scholar Chen S J, Zhu W C, Zhang M S, et al.Fractal description of rock joints based on digital image processing technique[J].Chinese Journal of Geotechnical Engineering, 2012, 34(11):2087-2092. Google Scholar
[16]	焦淑静, 韩辉, 翁庆萍, 等.页岩孔隙结构扫描电镜分析方法研究[J].电子显微镜学报, 2012, 31(5):432-436. Google Scholar Jiao S J, Han H, Weng Q P, et al.Scanning electron microscope analysis of porosity in shale[J].Journal of Chinese Electron Microscopy Society, 2012, 31(5):432-436. Google Scholar
[17]	Li H G, Li H M, Gao B, et al.Study on pore charac-teristics and microstructure of sandstones with different grain sizes[J].Journal of Applied Geophysics, 2017, 136:364-371. doi: 10.1016/j.jappgeo.2016.11.015 CrossRef Google Scholar
[18]	王坤阳, 杜谷, 杨玉杰, 等.应用扫描电镜与X射线能谱仪研究黔北黑色页岩储层孔隙及矿物特征[J].岩矿测试, 2014, 33(5):634-639. Google Scholar Wang K Y, Du G, Yang Y J, et al.Characteristics study of reservoirs pores and mineral compositions for black Shale, Northern Guizhou, by using SEM and X-ray EDS[J].Rock and Mineral Analysis, 2014, 33(5):634-639. Google Scholar