A numerical analysis of how permeability affects the development of pore water pressure in early age cemented paste backfill in a backfilled stope

Abstract

This paper examines the behaviour of cemented paste backfill in the top part of the paste column. The paste within this section tends to exhibit isotropic behaviour and behaves more like a fluid than a solid. This trend will be examined using in situ instrumentation data obtained from test stopes. This behaviour in this isotropic zone tends to be determined by consolidation properties as opposed to strength properties. In order to examine this behaviour three models were run. Two using a fixed permeability curve and the third using a function that determines the consolidation parameters as a function of curing age and applied stress. A comparison of these results will help determine how the paste is behaving at these early curing ages.

Insight into Saturated Hydraulic Conductivity of Cemented Paste Backfill Containing Polycarboxylate Ether-Based Superplasticizer

“…A number of studies have been conducted in recent years to understand the hydraulic conductivity behavior of CPB [21,[23][24][25][26][27]. The variation of the hydraulic conductivity in the CPB has been attributed to different factors such as tailings fineness [28], binder content [11,21], binder types [21,24], curing time and temperature [21,29], and sulfate content [21].…”