Mosaic Potash Mine K2 – Shaft Grouting Esterhazy, Saskatchewan, Canada Back to Project List Chemical Grouting Chemical grouting is performed from mine work station, 2760 feet below surface. Project Overview: The Mosaic Potash Mine is the largest producer and marketer of concentrated phosphate and potash crop nutrients in the world. The K2 Shaft began experiencing seepage into nearby freshwater aquifers at depth stations between 2760 feet and 3010 feet below surface and hired Layne GeoConstruction to perform the chemical grouting portion of the work. ECO Grouting Specialists was responsible for the grout mix design and method in which the grout would be injected into the shaft at the different depths or formations of the below ground geologic composition. Layne Geo worked in shifts opposite of the drilling operations that was performed by others. All work is done from a 75 feet diameter circular mine station 10 feet x 10 feet at a depth of 2760 feet below the surface. Casing is drilled into the various formations at different stations, grouted in place and pressure tested to 1500 psi. The holes are cleaned out and tremie grouted with cement grout and pressurized to 1500 psi using nitrogen. Layne designed and manufactured the specialized grout mixing placement system and has been specifically trained by Avanti for safe handling of chemical grouts. Real time monitoring of grouting operation was performed with Layne’s GeoGrout computerized monitoring system. At the end of the project, approximately 100,000 gallons of chemical grout will have been placed into the shaft to decrease the water flow through the various formations.     Value of Work Performed: $928,700 Project Duration: 5 months Project Completion Date: September 2009 Project Reference: Owner: Mosaic Potash Mine Dave Porsnuk 306.745.4560