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Conference Proceedings

MINEFILL '98 - The Sixth International Symposium on Mining with Backfill, Brisbane, Qld, April

Conference Proceedings

MINEFILL '98 - The Sixth International Symposium on Mining with Backfill, Brisbane, Qld, April

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Design Procedure and Results from a Field Test of Soil Freezing as Stabilisation of Bottom Slice Fill

Evaluation of different techniques for bottom fill stabilisation showed that frozen fill was the most economical method. In order to test the method a full-scale field test was performed in the Rehnstrom mine. The test was instrumented with temperature gauges and extensometers. Before the field test, frozen fill was tested at the laboratory. The mechanical properties of the frozen fill were determined by uniaxial compression and creep tests. A deformation model for the frozen fill was set up. Calculation procedure for design of spacing between the freezing tubes, time for freezing and calculation of the necessary capacity of the refrigeration plant was developed. These procedures were calibrated against the field test. The results of these investigations allow the following conclusions: From a mechanical point of view, frozen fill has excellent properties as a structural member and it also has excellent properties to support itself and the fill above.
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  • Design Procedure and Results from a Field Test of Soil Freezing as Stabilisation of Bottom Slice Fill
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  • Published: 1998
  • PDF Size: 0.301 Mb.
  • Unique ID: P199801017

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