Temperature change and the total stress anomaly in paste backfill

Alsidqi Hasan, Ting Wee Kiet, Fauzan Sahdi, Siti Noor Linda Taib, Norsuzailina Mohamed Sutan, Badhrulhisham Abdul Aziz, Andy Fourie

Research output: Contribution to journalArticle

Abstract

This paper presents preliminary results from a laboratory backfill model test in order to explain the effect of temperature change during the cement hydration on the total stress within cemented paste backfill. It is conducted via temperature control test in the absence of the cement. This investigation is an attempt to resolve an anomalous behavior reported in recent full scale monitoring reports, where the total vertical stress at the stope base shows a progressive increase after backfilling is terminated. The result in this paper shows that the total vertical stress is not affected by the level of the temperature but rather by the temperature gradient. The empirical relationship between the temperature gradient and the change in the total vertical stress is proposed. The total stress anomaly found in the full scale monitoring of paste backfill could be explained by the finding.

Original languageEnglish
Pages (from-to)90-95
Number of pages6
JournalInternational Journal of GEOMATE
Volume14
Issue number44
DOIs
Publication statusPublished - Apr 2018

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