Investigation of some controllable factors that impact the stress state in cemented paste backfill

James Doherty, Alsidqi Hasan, Gonzalo Fuentealba, Andy Fourie

    Research output: Contribution to journalArticle

    34 Citations (Scopus)

    Abstract

    © 2015, National Research Council of Canada. All rights reserved. This paper presents in-stope measurements of total stress and pore-water pressure at strategic locations within three underground stopes at the Raleigh mine site (Western Australia) that were filled with cemented paste backfill (CPB). The three stopes were very similar in shape. Key differences among the stopes were the filling and resting schedules, the barricade drainage systems used, and the cement content of the CPB. Data from the stopes are compared to determine which controllable factors most significantly influence barricade pressures during and after filling. The most significant factor was the scheduling of rest periods between filling, with even very short pauses in filling dramatically reducing the rate of increase of pore-water pressure and total stress with increasing height of fill.
    Original languageEnglish
    Pages (from-to)1901-1912
    Number of pages12
    JournalCanadian Geotechnical Journal
    Volume52
    Issue number12
    Early online date6 May 2015
    DOIs
    Publication statusPublished - Dec 2015

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