Abstract
Engineering and geological conditions of formation and operation of the technogenic massif of sandy-clay clay pelletised ores of gold heap leaching stack were investigated. Key factors determining the formation of stress-strain state of heap leaching stack were identified. The formation of the stress-strain state of the stack massif was evaluated. The main research methods included the use of numerical modelling of the stress-strain state of the stack massif with the application of continuum mechanics methods. It was established that the optimal approach to the assessment of the stress-strain state is a complex analysis based on an algorithm approximated to the conditions of formation and operation of the heap leach stack array. The modelling takes into account the stages of stack construction, compaction from the impact of mining transport equipment, as well as the weight of overlying rocks, taking into account different degrees of water saturation during operation. Filtration modelling made it possible to determine the zone of full saturation at given irrigation parameters. The formation of the stress-strain state of the heap leaching gold stack massif and its stability were analysed by longitudinal and cross-sectional modelling.
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