Determining Young's Modulus of Fractured Coal Rock Mass through a Homogenization Method

Bin Zhao; Zhi Yin Wang; Jin Peng Wu

doi:10.4028/www.scientific.net/AMR.718-720.496

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 718-720Determining Young's Modulus of Fractured Coal Rock...

Determining Young's Modulus of Fractured Coal Rock Mass through a Homogenization Method

Abstract:

Three main fractures exist in coal rock mass, including face cleats, butt cleats, and major fractures. The distribution of cleats and beddings in coal rock mass likes a regular reticular. A geological model was established without considering the major fractures. Young's moduli of fractured coal rock mass were gained through a homogenization method monolayer composite micromechanics analysis method. The relations between volume fraction or Young's moduli of cleat and Young's moduli of coal rock mass were investigated by calculation. Results shown that Youngs moduli of coal rock mass have the same change trends with the increase of volume fraction of cleat in the interval of 0.0018mm of width of cleat. And the width of cleat of 0.5mm is a critical point. Youngs moduli of coal rock mass monotonically increase with the increase of Youngs modulus of cleat in the interval of 0.0010.008GPa. Volume fraction and Young's moduli of cleats have notable effects on Young's moduli of coal rock mass.

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Periodical:

Advanced Materials Research (Volumes 718-720)

Pages:

496-501

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.718-720.496

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Online since:

July 2013

Authors:

Bin Zhao, Zhi Yin Wang, Jin Peng Wu

Keywords:

Cleat, Coal Rock Mass, Coordinate Transformation, Young's Modulus

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