|Document ID (ISN)||110337|
|Convention or series no.
||Etudes et Recherches R-622
||Development of an integrated method for analyzing the stability of backfilled stope
||Développement d'une méthode intégrée d'analyse de stabilité des chantiers miniers remblayés [in French]|
||Institut de recherche Robert-Sauvé en santé et en sécurité du travail du Québec (IRSST), 505 boul. de Maisonneuve Ouest, Montreal (Quebec) H3A 3C2, Canada, 2009. x, 49p. Illus. 61 ref. Price: CAD 12.60. Downloadable version (PDF format) free of charge.
||09-1371.pdf [in English]
http://www.irsst.qc.ca/files/documents/PubIRSST/R-622.pdf [in French]
||When mining operations require the use of cemented paste backfill (CPB), a system must be planned that provides the desired structural stability and safe space. Generally, the confined block model combined with a high safety factor is used to estimate the strength of the CPB required, and then formulations of mixtures of paste backfill are optimized in order to choose the best, according to the case. However, since the confined block was planned for a backfill with an internal friction angle of zero, limiting oneself to this single model shows a lack of knowledge about the subject, even while admitting that the friction angle would tend towards zero over the long term. However, the short and medium terms should also be taken into account. This study consisted of numerous experimental tests for the purpose of developing models for predicting and evaluating the distribution of stresses in backfilled sites. These models show the existence and variation in arching, which has direct impacts on costs. This report proposes a method for analyzing the stability of backfilled mining sites that integrates all the components of CPB. The method mainly allows the theoretical value of the required strength to be estimated, which helps meet the objectives due to the targeted optimization of mixture formulations.
||safety engineering; Quebec; mining industry; soil stability; underground mining
||Canada; report; mathematical models; economic aspects; compression
||E - Books, reports, proceedings
|Country / State or Province||Canada|
||Mines and quarries
|Broad subject area(s)
||Mechanical hazards, transport
||Trenching and excavating
Mining and quarrying