Experimental Study on the Anisotropy of the Tensile and Shearing Strength of Coal Rock

CUI Yueming, LI Yuwei


The tensile and shearing strength of coal rock accurately obtained by test can provide important parameters for the design of coal seam fracturing and mine support system. Due to coal bedding and cleat developed, the experimental results will exist voluminous discreteness and can’t accurate determine the tensile and shearing strength, ignoring the influence of loading direction and bedding and cleat development direction, In this paper, the tensile and shearing strength is measured by laboratory experiment, counting and analyzing divergence of different direction according to experimental results, obtaining the relationship between the tensile and shearing strength and the bedding and cleat development direction. This research confirms that the tensile and shearing strength of coal rock exists the characteristic of anisotropy and it should not only take the average value of the test results of different direction simply in engineering application. On the other hand, it can supply experimental consideration and method to confirm the tensile and shearing strength required by the relevant construction design.
Key words: Coal rock; Tensile strength; Shearing strength; Anisotropy


Coal rock; Tensile strength; Shearing strength; Anisotropy

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DOI: http://dx.doi.org/10.3968/6301


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