Evaluation of injection well patterns for optimum fracture network generation host-rock formations: An application in in-situ leaching

摘要: Abstract Artificial fracture stimulation in host-rock using soundless cracking demolition agents (SCDAs) is a potential alternative for rock fragmentation enhanced in-situ leaching applications of mineral ores because conventional mining techniques are becoming increasingly uneconomic with declining ore-grade. In this study we investigated the impact different injection well patterns on network propagation an SCDA charged mass discrete element numerical simulation. First, laboratory scale fracturing experiment was conducted simple specimen having two wells filled SCDA. The results were used to validate simulation, and model then extended assess formation typically found field. A two-staged process identified from simulation observations defined as pre-fracture coalescence post-fracture stages. expansive pressure development within charging corresponding growth be dependent number surrounding centre well. With increasing wells, connectivity between decrease consequentially diminishing return density observed. This result larger compressive stress fields generated wells. optimum four or five (five six pattern), which produces highest ISL applications.