Determination of the optimal numberof mining equipment when forming stockpiles in an iron ore open-cast mine

Purpose. Determination of the optimal number of mining equipment when forming rock overburden dumps for iron ore open-cast mine conditions. The methods. Analytical, statistical, and graph-analytical research methods were used in the work. Findings. An analysis was conducted of the application of dump formation processes in deep iron ore open-cast mines, which affect the rhythm of the mining operation and the efficiency of the mining enterprise as a whole. It was determined that bulldozer dump formation is used in most modern iron ore open-cast mines. The advantages of using bulldozer dump formation when moving rock overburden to the dump-by-dump trucks are presented. The required volumes of dump containers for the conditions of the Ferrexpo Poltava Mining open-cast mine were determined. The influence of the power of bulldozer equipment on its required quantity depending on the volumes of overburden storage was established. The results obtained allow us to state that the most optimal bulldozer equipment used in the Ferrexpo Poltava Mining is the CAT D10T bulldozer. The originality. The conducted studies allowed us to establish the dependence of the required number of bulldozer equipment on the volume of overburden that must be placed in the dump. The obtained dependences are described by first-order equations with a high degree of accuracy. Practical implementation. The results of the studies allowed us to substantiate the rational number of modern bulldozer equipment when forming rock dumps. The results of the study can be used in rock mining where bulldozer dump formation is used.