Mining in Manitoba

Solution Caving

Engineering Considerations

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Solution mining techniques are used for extracting soluble ores such as potash and salt in situations where conventional mining methods would not be economic. Total solution of all the mineral is not always accomplished. Sulfur is mined by the Frasch process, using steam to melt the sulfur and bring it to the surface through bore holes. The future of solution mining appears promising, for there is constant improvement in equipment, solvent, and in technology of breaking rock in place and controlling the movements of fluids through it.

In mining salt, potash, and sulfur, the overburden and surface over it subside. Subsidence it desirable, because it increases the solution of mineral, and destroys voids, reducing the amount of solution required and the time needed for it to act.