What is it about?
This paper provides a method to estimate the height of failure above a coal mine roof by considering both the brittle failure of the rock and also the influence of bedding partings. The presence of bedding makes the rock anisotropic which limits the applicability of methods used in hard rock mines where isotropy can be validly assumed.
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Why is it important?
The importance is in the combination of transverse isotropy and brittle strength - what is referred to as the TIB criterion. It can implemented in 2 stages using Mohr Coulomb parameters.
Perspectives
It is important to note that a later paper in this same journal has improved the selection of the bedding parameter (E/G ratio) and more work is being conducted to establish a relationship between this parameter and measured bedding spacing.
Ross Seedsman
Read the Original
This page is a summary of: Practical strength criterion for coal mine roof support design in laminated soft rocks, Mining Technology Transactions of the Institutions of Mining and Metallurgy Section A, December 2013, SAGE Publications,
DOI: 10.1179/1743286313y.0000000044.
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