Investigation of leave level of copper ore of Zhezkazgan deposit

In the conditions of the Zhezkazgan copper deposit, which is worked underground, the losses of ore in the left pillars fluctuate from 12 to 25 %, sometimes reaching 40%. During the development of the Zhezkazgan deposit, tens of millions of tons of rich ore were left in various kinds of losses. The annual increase in ore losses in various parts, taking into account the increasing production, is approximately equal to the annual productivity of the whole mine. Also in the production process so far rich in content of the interlayer copper ores of low power. Therefore, the search for the most effective methods of mining lost, off-balance and waste ores is of paramount importance. One of such methods is underground leaching, which allows to carry out their secondary development and make maximum use of the mineral wealth. The aim of the research was to experimentally study the leaching of oxidized, mixed and sulphide copper ores of the old spent mines in the Zhezkazgan deposit using various solvents...