NEW LEACHING-MINING PROCESS BY DRILLING UNDERGROUND IN SITU

摘要

Disclosed is a leaching-mining process by drilling underground in situ. The process employs chemicals such as acids or bases to dissolve and leach useful metal constituents in the body of the mine, convert them from a solid state to a liquid state, and extract the metal constituents after recovery, by means of chemical reactions or physical reactions. With this mining process, no large-scale base construction underground or on the surface is needed, no environmental damage is caused to the surface of earth, and underground water is not polluted when effective containment conditions are employed, reducing the stages of digging and mineral dressing in traditional mining. The new oriented drilling process and fracture-acidizing technology can also mine hundreds of metres to thousands of metres of metal ore deposits which were previously difficult to mine, rapidly improving mining cycles and at the same time reducing mining costs to the maximum extent possible.