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Project Overview

Project Number
Project Theme
Mineral Systems


This project investigated the variation in the mechanical characteristics of saturated, included sandstone aquifers in the Collie Coal Basin as they were dewatered.

The methodology adopted consisted of simulating the assumed in-situ conditions on triaxially confined, saturated laboratory specimens that had been prepared from in-situ core samples.

Dewatering was simulated by pore pressure release followed by vertical water flow induction through the specimen.

The tests required the design and commissioning of modified triaxial test equipment and the development of a modified triaxial test technique.

The report describes the equipment and test techniques, and gives an analysis and interpretation of the results.

Keywords: sandstone, aquifer, pore pressure, dewatering, triaxial, subsidence

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Page was last reviewed 11 May 2022

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