METHOD FOR STORAGE OF ROCKS Russian patent published in 1995 - IPC

FIELD: mining of ore deposits. SUBSTANCE: placed on prepared area 1 of slope in the dump base is impervious layer 2 of rocks. Then, layers of dump are successively filled. Within layer first is formed section of substandard ores 3, then, in odd layers, section of geometrical barrier 4 is formed, and in even layers, sections of rocks producing active agent 5 are filled. Then, section 6 from rocks with minor content of useful components is filled. Formed layer is separated from next layer by means of film 7 to ensure from below admission of solution to next layer. Further on, dump formation cycle is repeated. The second layer is covered with film 7 and leaving at the top on non-isolated area, etc. Side surface of dump is covered with impervious screen 8 and leaving discharge slot 9. Surface of dump is treated with water containing active agents from source 10. Useful components contained in rocks of section 6 are dissolved and migrate to get in zone of action of geometrical barrier 4 where useful components are precipitated in barrier section 4 and section of substandard ores. Screen 7 sets sequence of solution circulation. Partially cleaned solutions get in next layer and pass section of rocks 5 where they are saturated with active agents. Then, useful component is dissolved and migrates into sections 6 of next layer, etc. Impervious coating 8 prevents loss of solvents, and discharge slot 8 serves for discharge of cleaned solutions. EFFECT: higher efficiency. 3 cl, 1 dwg