Large-Scale Uniaxial Test

There has been a report from Japan recently31, of a large-scale version of the uniaxial test, applicable to coarse granular materials like coal and limestone containing particles up to 50 mm in size. Although such coarse materials are outside the scope of this report, the test still deserves a mention here because it is a logical extension of the tests reported in the two previous sections. 

The paper does not describe the sample preparation in much detail but it appears that the test mould is a split cell like the one used with the Compression Tackiness Tester except that the L/D ratio is always equal to two. The mould is not split into section horizontally like the one used by Williams et al,24 and the material is reported to be filled in the mould in three layers. Three different 

Comments This again is a test suitable for fingerprinting 

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In the past, geotechnical evaluations of coal mine roof rock have been based largely on laboratory testing of rock properties, such as uniaxial compressive strength and direct sheer. However, laboratory testing fails to consider the field-scale discontinuities, particularly bedding planes (28), that usually control the structural competence of the roof.- ... 

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