Assessment of Acid Mine Drainage Formation for Sustainable Mine Closure Practices
Oktarian Wisnu Lusantono (a*), Shenny Linggasari (a), Vinansius Jimmy Jati (b), Dimas Sih Nugroho (b)

a) Mining Engineering Department, UPN Veteran Yogyakarta Jalan Padjajaran 104 Sleman 55281, Indonesia
b) PT Studio Mineral Batubara, Plemburan Tegal No 67 Sleman 55284, Indonesia

Abstract

Acid Mine Drainage (AMD) represents a significant environmental challenge associated with mining activities, particularly in the context of mine closure. The formation of AMD occurs when sulfide minerals, exposed to air and water, undergo oxidation, leading to the production of sulfuric acid. This acid can leach heavy metals and other toxic elements from surrounding rocks, posing severe risks to water quality, ecosystems, and human health. Sustainable mine closure practices necessitate a comprehensive understanding of AMD processes to prevent long-term environmental degradation.
This assessment examines the factors influencing AMD formation, including the mineralogy of the ore body, geochemical conditions, and hydrological factors. It also explores the predictive models used to evaluate AMD potential and the effectiveness of various mitigation strategies. Key approaches include the isolation of reactive sulfide materials from oxygen and water, the use of alkaline materials to neutralize acidity, and the implementation of passive and active treatment systems for contaminated water.
The study underscores the importance of early planning and continuous monitoring in mine closure operations. By integrating AMD management into the broader framework of sustainable mining, the long-term impacts on the environment can be minimized. This includes employing best practices in waste rock and tailings management, ensuring that closure plans are adaptable to changing conditions, and involving stakeholders in decision-making processes.

Keywords: Acid mine drainage, mine closure, geochemical

Topic: Engineering