ECOLOGICAL AFFECT REDUCTION FOR THE MINES WITH THE UNDERGROUND ELECTROCHEMICAL LEACHING BY CHANGING CURRENT SUPPLY INTO ORE MASS

摘要

One of the perspective trends concerning the metals mining technology intensification based on the underground leaching is the electric current of various types and frequency impact aimed at the leached ore mass state changing being the heterogeneous medium. Simultaneously, the process acceleration can significantly reduce the mines impact on environment due to their stockpiling duration decrease. The methods of the underground electrochemical leaching are described in numerous foreign and Russian scientific works. The unconditional demand of the electric fields effective application is the provision of the minimal power consumption during the process implementation. The power consumption is determined by the electric current supply method into ore mass under treatment. For the underground leaching of the bedrock deposits including those of North Ossetia - Alania (Russian Federation) 2 ways of the electric current supply are possible: using the system of co - axis and apposite electrodes placed in the ore mass and using the parallel electrodes passing through it. The reference sources present the theoretical studies of the electric fields distribution in the leached ore mass depending on the current supply. As for the experimental research it hasn't been carried out. The present article presents the research results on this problem. The obtained results analysis and the mathematical models allows juxtaposing the efficiency of the current supply methods mentioned above. It has been proved that the current supply using the parallel electrodes passing through the ore mass is 20% more efficient than using the co - axial and opposite electrodes placed in the ore mass and taking into account other equal conditions it can considerably reduce the mines impact on the environment.