Assessment of horizontal pillar burst in deep hard rock mines Online publication date: Mon, 18-Jun-2007
by Hani S. Mitri
International Journal of Risk Assessment and Management (IJRAM), Vol. 7, No. 5, 2007
Abstract: The paper examines three methods for assessing the stability of horizontal pillars in deep underground hard rock mines. Such pillars could suffer from strain-type rockburst when they become too thin in an environment characterized by high in situ stress and hard, brittle rock. The methods presented are: potential stress failure (PSF), energy release rate (ERR) and the Burst Potential Index (BPI). It is shown through a numerical model of a characteristic crown pillar problem that the BPI is the most suitable of the three. Contrary to the PSF method, the BPI method accounts for the rock mass strength and deformability.
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