When the Flying Fox mine in Western Australia intersected an aquifer producing between 50 to 70 litres of water per second, site managers turned to waterproofing systems from Sovereign Hydroseal .
Situated 400km east of Perth, the Flying Fox mine had progressed to a depth of approximately 250m when it intersected the aquifer, producing unexpected inflows that could not be managed by pumping from within the mine workings, as had been previously envisaged.
Sovereign Hydroseal conducted a short fluorescent dye test of five hours to reveal the true nature of the problem, and identify which of its waterproofing systems would provide an effective solution.
The company analysed:
- ground conditions
- veining of the broken rock complex
- flow direction; and
- water pressures.
With this information, Sovereign was able to design a grout pattern for the site, and within one shift was able to achieve a watertight seal.
As there were permeable zones throughout the entire depth of the mine, Sovereign returned as the decline developed deeper to complete additional water sealing on lower levels.