Shallow Storage Dewatering for End-of-phase open pit mining Operations using Blastholes

Abstract Mining operations often face challenges in managing water levels during the concluding phases of open-pit extraction and pit floor deepening, where efficient shallow dewatering is critical for continued operations. This technical article explores and discusses a successful engineering application of blastholes for shallow dewatering, presenting a novel approach that optimizes water removal and enhances operational mining and safety. Through the drilling and construction of blasthole wells, this method has demonstrated significant benefits and results, providing a strategic solution for (1) operational continuity of mining operations during the concluding phases of open-pit extraction; (2) achieving targeted dewatering objectives to meet production goals; and (3) providing safer working conditions by minimizing the risks associated with excess water accumulation that can pose hazards to equipment and personnel. Furthermore, it addresses the risk of losing the final and most economically important benches of a phase if traditional dewatering methods have fallen behind during the phase development. The conclusions highlight the effectiveness and adaptability of blasthole wells for rapid removal of shallow water storage to accomplish operational, safety, and efficiency benefits to mining operations, offering a valuable contribution to the progress of end-of-phase open pit mining.