Experimental Study on Inflow Characteristics and Control of Overburden Moraine During Ore Drawing by Natural Caving Method
In order to solve the problem of high depletion loss caused by the inflow of fine particles of overburden moraine during ore drawing by natural caving method,the similar simulation test of indoor ore drawing was adopted,and two overburden moraine states of natural accumulation and consolidation modification were selected for test,and the mixing rate of fine particles during ore drawing was statistically analyzed.The research results show that under the overburden moraine state of natural accumulation,the mixing rate increases exponentially with the increase of ore drawing height,and the mixing rate is proportional to the content of fine particles in the overburden.The ore drawing under the moraine overburden can be divided into four stages,including pure ore discharge,rapid inflow of a small amount of fine particles,mixing of fine particles with ore and large inflow of fine particles.Under the overburden moraine state of consolidation modification,the mixing rate of fine particlescan be reduced by more than 50％,and the amount of ore drawing can be increased by 30％.Consolidation modification is an effective means to control the inflow mixing of fine particles of overburden moraine.
Natural caving methodOverburden moraineInflow of fine particlesMixing rateConsolidation modification
万方数据
维普
