Options
Assessment and characterization of waste material used as backfilling in an abandoned mine
Journal
International Journal of Coal Preparation and Utilization
ISSN
19392699
Date Issued
2023-01-01
Author(s)
Shirin, Saba
Jamal, Aarif
Emmanouil, Christina
Singh, Vijay P.
Yadav, Akhilesh Kumar
Abstract
Overburden is the earth material removed during opencast mining, which is typically not contaminated with toxic materials. After mining operations, overburdens are dumped on exhausted mining sites. However, some opencast mines are not properly backfilled, and this causes harmful environmental effects, such as leaching of acid mine drainage. The flyash produced from thermal power plants is also a major waste that must be disposed of environmentally friendly. This study focuses on filling the voids of an abandoned mine with a mixture of 70% overburden + 30% flyash. A considerable improvement in acid mine drainage characteristics was found after either adding overburden or an overburden and flyash mixture. Sustainable management of coal mines should include the careful restoration of exhausted mines, which can be made possible by repurposing relevant industrial waste.
Subjects