Abstract
Laboratory tests to establish the influence of the material and particle size distribution composition of hydrogenous ores on the intensity of sedimentation of colmatants during in-situ leaching have established that the main reason for loss of productivity of technological wells during in-situ leaching of hydrogenous ores of the Khiagda ore field deposits is colmatation of their near-filter zone. The greatest influence is exerted by mechanical and chemical colmatation, in the process of which fine mechanical suspensions accumulate in the near-filter zone and products of chemical reactions occurring during leaching [4; 9–12]. It has been determined that the most effective way to eliminate mechanical bridging is pneumatic-pulse processing of the filter zone of technological wells, and the use of processing wells with hydrochloric acid and ammonium bischofite allows to remove most of the chemical bridging agents deposited on the structural elements of the well reinforcement [2, 3]. The conducted research makes it possible to improve the regulation of repair and restoration works when treating technological wells in the process of carrying out production works at the hydrogenous deposits of the Khiagda ore field. The results of applying technical solutions to restore the serviceability of injection and injection wells are given in this article
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