Solution mining is different from the conventional underground mining method, which has been widely used in North America. Solution mining of potash ore involves injecting heated solvent into the underground potash ore via drill holes to dissolve potash. The dissolved salts are then pumped out of the cavern to a processing plant where the brine is evaporated and crystallized, leaving behind the potassium chloride.
Solution mining method shows significant advantages comparing with the conventional underground mining, such as lower capital expenditures and less environment impact.