Abstract:In order to explore the effect of well spacing on the uranium leaching efficiency in acid in-situ leaching, taking the Bayan Ula mining area as an example, and using the finite element method to establish a numerical model for acid in-situ leaching uranium mining, and discuss the coverage and flow rate of the leaching solution. Through the comparison and analysis of 26 schemes, the influence of different well spacing on uranium leaching was discussed from three aspects: well site cost, uranium leaching cycle, and leaching dead angle. The results show that: 1) The fixed cost of the mining area varies with the well. 2) The characteristic flow velocity in the mining area decreases with the increase of the well spacing, and the relative uranium leaching period increases with the increase of the well spacing; 3) With the increase of the well spacing, the volume of the leaching dead angle increases approximately exponentially. Comprehensive consideration, under the simulation conditions in this paper, it is considered that 26 meters to 30 meters is the optimal well spacing for uranium leaching. The results can provide a reference for the reasonable layout of subsequent ground leaching process holes in this mine area.