Flooding and loss of the Patience Lake potash mine

Abstract In early 1987, the Patience Lake potash mine near Saskatoon, Saskatchewan, was closed due to uncontrollable flooding. Water inflows were first encountered during routine mining in 1975 at the south boundary of the mine lease. Underground grouting and construction of bulkheads limited the flow but did not completely stop it. Subsequent seismic surveys showed that the mine had approached the edge of a large collapse structure in which the salt and potash had been partly dissolved and removed by groundwater.
In 1986, the small flow into the mine started to grow. Despite renewed grouting, the flood increased and outstripped pump capacity. The grouting program temporarily slowed the inflow but was unable to stop it. Eventually, from seismic and drilling evidence, it became clear that the water source was an
extensive system of vertical fractures which would be impossible to seal by drilling and grouting from underground. A new plan to install 14 bulkheads underground would have sealed the water source from the rest of the mine but the construction program could not be completed before rapidly increasing inflows threatened to fill the mine. The underground mine was closed and a new solution mine started in 1988.
Keywords: Flooding, Groundwater control, Patience Lake mine, Potash mining, Salt collapse
structures, Underground mining,.
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Publication: CIM Bulletin
Author(s): David Forrester
Issue: 1000
Volume: 89
Year: 1996
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Publication: CIM Bulletin
Author(s): H.R. Stoger
Keywords: Transportation, Ocean carriers.
Issue: 1000
Volume: 89
Year: 1996
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Publication: CIM Bulletin
Author(s): David J. Forrester
Keywords: Cape Breton Coal Research Laboratory, Research and development, Underground mining.
Issue: 1000
Volume: 89
Year: 1996
Text
Publication: CIM Bulletin
Author(s): Larry A. Morris
Keywords: Environmental issues, Product stewardship.
Issue: 1000
Volume: 89
Year: 1996
Text
Publication: CIM Bulletin
Author(s): Larry A. Morris
Keywords: Environmental issues, Product stewardship.
Issue: 1000
Volume: 89
Year: 1996
Text
Publication: CIM Bulletin
Author(s): Robert D. McKellar, Richard Okrasa, Luke Frawley
Keywords: Electrical energy, Energy efficiency, Electrotechnology.
Issue: 1000
Volume: 89
Year: 1996
Text
Publication: CIM Bulletin
Author(s): Robert D. McKellar
Keywords: Electrical energy, Energy efficiency, Electrotechnology.
Issue: 1000
Volume: 89
Year: 1996
Text
Publication: CIM Bulletin
Author(s): André Piché
Issue: 1000
Volume: 89
Year: 1996
Text
Summary: Increasing mine depth and panel length combined with faster longwall retreat rates necessitated a change from the passive support of steel sets to roofbolts at the Phalen Colliery in the Sydney Coalfield. Development drivage rates achieved with roadheaders installing steel sets would not support the retreat rates of the longwall panels. Also, front abutment pressures from the longwall retreat were seriously deforming the steel sets. In 1991, full column resin grouted roofbolts were introduced...
Publication: CIM Bulletin
Author(s): John Baldwin
Keywords: Equipment, Continuous miners, Mine bolters
Issue: 1000
Volume: 89
Year: 1996
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