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Volume 28 Issue 2
Apr 2017
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Mingming Wei, Yiwen Ju, Quanlin Hou, Guochang Wang, Liye Yu, Wenjing Zhang, Xiaoshi Li. A New Parameter as an Indicator of the Degree of Deformation of Coals. Journal of Earth Science, 2017, 28(2): 358-366. doi: 10.1007/s12583-015-0576-1
Citation: Mingming Wei, Yiwen Ju, Quanlin Hou, Guochang Wang, Liye Yu, Wenjing Zhang, Xiaoshi Li. A New Parameter as an Indicator of the Degree of Deformation of Coals. Journal of Earth Science, 2017, 28(2): 358-366. doi: 10.1007/s12583-015-0576-1

A New Parameter as an Indicator of the Degree of Deformation of Coals

doi: 10.1007/s12583-015-0576-1
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  • The deformation of coal is effected by thermal effect, pressures and tectonic stress, and the tectonic stress is the principal influence factor. However, the proposition of a useful quantitative index that responds to the degree of deformation of coals quantitatively or semi-quantitatively has been a long-debated issue. The vitrinite reflectance ellipsoid, that is, the reflectance indication surface (RIS) ellipsoid is considered to be a strain ellipsoid that reflects the sum of the strain increment caused by stress in the process of coalification. It has been used to describe the degree of deformation of the coal, but the effect of the anisotropy on the RIS ellipsoid has not yet been considered with regards to non-structural factors. In this paper, Wei's parameter (ε) is proposed to express the deformation degree of the strain ellipsoid based on considering the combined influence of thermal effect, pressure and tectonic stress. The equation is as follows: $\varepsilon = \sqrt {\left[ {{{\left({{\varepsilon _1} - {\varepsilon _0}} \right)}^2} + {{\left({{\varepsilon _2} - {\varepsilon _0}} \right)}^2} + {{\left({{\varepsilon _3} - {\varepsilon _0}} \right)}^2}} \right]/3} $, where ε1=ln Rmax, ε2=ln Rint, ε3=ln Rmin, and ε0=(ε1+ ε2+ ε3)/3. Wei's parameter represents the distance from the surface to the spindle of the RIS logarithm ellipsoid; thus, the degree of deformation of the strain ellipsoid is indicated quantitatively. The formula itself, meanwhile, represents the absolute value of the degree of relative deformation and is consequently suitable for any type of deformation of the strain ellipsoid. Wei's parameter makes it possible to compare degrees of deformation among different deformation types of the strain ellipso id. This equation has been tested in four types of coal: highly metamorphic but weakly deformed coal of the southern Qinshui Basin, highly metamorphic and strongly deformed coal from the Tianhushan coal mining area of Fujian, and medium metamorphic and weakly or strongly deformed coal from the Huaibei Coalfield. The results of Wei's parameters are consistent with the actual deformation degrees of the coal reservoirs determined by other methods, which supports the effectiveness of this method. In addition, Wei's parameter is an important complement to the indicatorsof the degrees of deformation of coals, which possess certain theoretical significance and practical values.

     

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  • Bustin, R. M., Mastalerz, K. R., Wilks, K. R., 1993. Direct Determination of Carbon, Oxygen and Nitrogen Content in Coal Using the Electron Microprobe. Fuel, 72(2): 181-185. doi: 10.1016/0016-2361(93)90395-i
    Bustin, R. M., Ross, J. V., Moffat, I., 1986. Vitrinite Anisotropy under Differential Stress and High Confining Pressure and Temperature: Preliminary Observations. International Journal of Coal Geology, 6: 343-351 doi: 10.1016/0166-5162(86)90009-1
    Cao, D. Y., 1990. The Vitrinite Reflectance Anisotropy in the Nappe Structure in the Huaibei Coalfield, Anhui Province. Geology Review, 36(4): 334-340 (in Chinese with English Abstract). http://en.cnki.com.cn/Article_en/CJFDTOTAL-DZLP199004005.htm
    Cao, D. Y., 1991. Deformation Indicators for Study of Tectonic Stresses Field in Coalfield. Journal of China Coal Society, 16(1): 73-80 (in Chinese with English Abstract)
    Cao, D. Y., Wang, W. X., 1990. Analysis Technique of Heterogeneous Vitrinite Reflectance and Its Application on Structural Studies. Coal Geology of China, 2(1): 1-8 (in Chinese)
    Duber, S., Pusz, S., Kwiecinska, B.K., et al., 2000. On the Optically Biaxial Character and Heterogeneity of Anthracites. International Journal of Coal Geology, 44(3-4): 227-250. doi: 10.1016/s0166-5162(00)00012-4
    Flinn, D., 1962. On Folding during Three-Dimensional Progressive Deformation. Quarterly Journal of the Geological Society, 118(1-4): 385-428. doi: 10.1144/gsjgs.118.1.0385
    Hower, J. C., Davis, A., 1981.Vitrinite Reflectance Anisotropy as a Tectonic Fabric Element. Geology, 9(4): 165-168. doi:10.1130/0091-7613(1981)9<165:vraaat>2.0.co;2
    Jiang, B., Jin, F. L., Zhou, Q., et al., 1997. Experimental Research on Deformation of Optical Fabric of Coal Vitrinite Reflectance. Coal Geology & Exploration, 25(2): 11-15 (in Chinese with English Abstract) http://en.cnki.com.cn/Article_en/CJFDTotal-MDKT702.002.htm
    Jiang, B., Qin, Y., 1999. Geocheminal Mechanism of Evolution of Vitrinite Reflectance of Deformed Coals and Its Geological Significance. Coal Geology & Exploration, 27(5): 19-22 (in Chinese with English Abstract) http://en.cnki.com.cn/Article_en/CJFDTOTAL-MDKT199905005.htm
    Jiang, J. P., Gao, G. Y., Kang, J. W., 2007. Tests on Vitrinite Reflectance of Coal and Analysis of Tectonic Stress Field. Chinese Journal of Geophysics, 50(1): 138-145 (in Chinese with English Abstract) doi: 10.1002/cjg2.v50.1
    Jones, J., Creaney, S., 1977. Optical Character of Thermally Metamorphosed Coals of Northern England. Journal of Microscopy, 109(1): 105-118. doi: 10.1111/j.1365-2818.1977.tb01120.x
    Ju, Y. W., Wei, M. M., Hou, Q. L., et al., 2010. The Tectonic Differentiation of the Coal Basins and the Emplacement Models of the Deep Coal in North China. Journal of China Coal Society, 35(9): 1501-1505 (in Chinese with English Abstract) https://www.researchgate.net/publication/287630262_The_tectonic_differentiation_of_the_coal_basins_and_the_emplacement_models_of_the_deep_coal_in_North_China
    Ju, Y. W., Wei, M. M., Xue, C. D., 2011. Control of Basin-Mountain Evolution on the Occurrence of Deep Coal and Coalbed Methane in North China. Journal of China University of Mining & Technology, 40(3): 390-398 (in Chinese with English Abstract) https://www.researchgate.net/publication/287630161_Control_of_basin-mountain_evolution_on_the_occurrence_of_deep_coal_and_coalbed_methane_in_North_China
    Khorasani, G. K., Murchison, D. G., Raymond A. C., 1990. Molecular Disordering in Natural Coals Approaching Dyke and Sill Contacts. Fuel, 69(8): 1037-1046. doi: 10.1016/0016-2361(90)90016-j
    Langerberg, W., Kalkreuth, W., 1991. Reflectance Anisotropy and Syn-Deformational Coalification of the Jewel Seam in the Cadomin Area, Alberta, Canada. International Journal of Coal Geology, 19(1-4): 303-317. doi: 10.1016/0166-5162(91)90025-e
    Levine, J. R., Davis, A., 1984. Optical Anisotropy of Coals as Indicator of Tectonic Deformation, Broad Top Coal Field, Pennsylvania. The Geological Society of America Bulletin, 95(1): 100-108. doi:10.1130/0016-7606(1984)95<100:oaocaa>2.0.co;2
    Levine, J. R., Davis, A., 1989. Reflectance Anisotropy of Upper Carboniferous Coals in the Appalachian Foreland, Pennsylvania, U.S.A. International Journal of Coal Geology, 13(1-4): 314-373. doi: 10.1016/0166-5162(89)90099-2
    Li, Z., 1994. Collision between the North and South China Block: A Crustal-Detachment Model for Suturing in the Region East of the Tanlu Fault. Geology, 22 (8): 739-742 (in Chinese with English Abstract) doi: 10.1130/0091-7613(1994)022<0739:CBTNAS>2.3.CO;2
    Ross, J. V., Bustin, R. M., 1997. Vitrinite Anisotropy Resulting from Simple Shear Experiments at High Temperature and High Confining Pressure. International Journal of Coal Geology, 33: 153-168 doi: 10.1016/S0166-5162(97)87370-3
    Stach, E., Mackowsky, M. T., Techmuller, M. E. A., 1982. Stach's Textbook of Coal Petrology. Gebruder Borntraeger, Berlin. http://www.worldcat.org/title/stachs-textbook-of-coal-petrology/oclc/8418371
    Stone, I. J., Cook, A. C., 1979. The Influence of Some Tectonic Structures upon Vitrinite Reflectance. Journal of Geology, 87(5): 497-508. doi: 10.1086/628442
    Wang, G. L., Cao, D. Y., Jiang, B., et al., 1992. Thrust Nappe, Extensional Gliding Nappe and Gravity Gliding Structures in the Southern Part of North China, in Addition on the Research Methods of Decollement. China University of Ming and Technology Press, Xuzhou (in Chinese)
    Wei, M. M., 2011. Structural Deformation of High Rank Coal and Its Effect on Permeability of Coalbed Methane Enrichment Area in the Southern Section of Qinshui Basin: [Dissertation]. Kunming University of Science and Technology, Kunming. (in Chinese with English Abstract)
    Wemicke, B., 1981. Low Angle Normal Faults in the Basin and Range Province: Napple Tectonics in an Extending Orogeny. Nature, 291(5817): 645-647. doi: 10.1038/291645a0
    Wu, Y. D., 2010. Study on Characteristics of Tectono-Thermal Modeling and Regularities of Coalbed Gas's Distribution and Enrichment, Huaibei-Huainan Coalfields, China: [Dissertation]. Graduate University of Chinese Academy of Sciences, Hefei. (in Chinese with English Abstract)
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