Study on Grain Size Characteristics and Strength Test of Gravel in Conglomerate Layer of a Coal Mine

Xiao Lei Wang; Shun Xi Yan; Shu Jiang Zhao

doi:10.4028/www.scientific.net/AMM.170-173.395

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 170-173Study on Grain Size Characteristics and Strength...

Study on Grain Size Characteristics and Strength Test of Gravel in Conglomerate Layer of a Coal Mine

Abstract:

The direct roof of B132 coal seam is conglomerate layer in a coal mine, which is cemented with gravels and sandstones and has brought great difficulty for tunnel supporting. It is necessary to study the grain size and strength characteristics of gravel in conglomerate layer for the mining of B132 coal seam safely and efficiently. The statistics and analysis of grain-size characteristics of gravel was carried out in this paper, including of the quantity and volume percent of gravel. Uniaxial compressive strength of gravel was tested with point load method. The test results show that uniaxial compressive strength of gravel is very high, especially the black gravels, whose compressive strength is commonly above 200 MPa and the highest even can reach more than 300 MPa.

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Periodical:

Applied Mechanics and Materials (Volumes 170-173)

Pages:

395-398

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.170-173.395

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Online since:

May 2012

Authors:

Xiao Lei Wang, Shun Xi Yan, Shu Jiang Zhao

Keywords:

Grain-Size Characteristics, Gravel, Point Load, Strength Test

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