<p>The mining industry's digital transformation (DT) presents a myriad of challenges, particularly in the strategic transition toward the concept of the Smart Mine, which is characterized by digital connectivity, sustainability, and real-time decision-making capabilities that enhance productivity and safety, focusing on human-centered workforce transformation. This paper seeks to evaluate the current DT approaches employed within the underground mining sector to facilitate this transformative process. To accomplish this, we conduct a comprehensive review of academic and non-academic literature on existing strategies that guide DT initiatives within the mining domain. Next, we extract successful practices and approaches from both the mining sector and the broader Industry 4.0 landscape, seeking to evaluate the implemented activities and their corresponding value using expert insights. Our findings indicate a disparity in adherence to the recommended sequence for portfolio management phases, with notable challenges in the categorization and balancing phases, which are the least utilized. Moreover, we observe that the majority of activities suggested in the literature related to Industry 4.0 and the mining sector are employed by over 50% of portfolio management experts. Despite these variances in application, most activities are perceived as valuable by industry experts, underscoring their potential contribution to the mining sector's DT journey.</p>