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In the project documentation for rock salt deposit Tetima exploitation, two methods of exploitation are developed: method of lateral leaching with narrow footstep tubing as the main method applied on all drilled boreholes, and method of roof leaching with cemented protecting column as the alternative method, which will be applied in such parts of deposit where it has the advantage over the method of narrow footstep tubing. Evaluation and decision on application the method of roof leaching with cemented protecting column will be made after ascertainment the above parameters in drilled borehole. This method has not been applied yet. The main aim of this paper is to find an optimum for continous exploitation the existing boreholes through techno-economic analysis of previously applied method. The analysis was carried out on an example of borehole B-67, and it has processed the regularity of chambers, "escaping" of the roof and balancing of isolant, and the all mentioned in correlation with the geological conditions. The Institute OBRGSChem. „CHEMKOP“ in Krakow has done a computer simulation of technology with lateral and roof leaching with two movable columns using the program WinUbroNet for borehole B-67 in two options: with partial isolation of roof and without isolation.

New leaching method on the rock salt deposit 'Tetima' near Tuzla