Tracking the Source: Backfill and Backfill Water Quality at A Large Powder River Basin Coal Mine

Role of Natural Organic Solutes on the Sorption of Selenium by Coal Mine Backfill- Core Samples from the Powder River Basin, Wyoming

Concentrations of dissolved selenium (Se) as large as 330 pg L-' have been detected in water samples &om bacW aquifers in the southern Powder River Basin (PRB) of northeastern Wyoming. During d a c e coal mining, rock mstwial overiymg the coal is redistributed in relation to its original stratigraphic position; exposure of the prewiously buried material to surface oxidizing conditions decreases...

Impact of Mine Waters on River Water Quality in the Upper Silesian Coal Basin

The Upper Silesian Coal Basin (USCB) is located within the Vistnla and Oder basins in the southern part of Poland. The coal seams in the USCB are exploited by the underground mining of average depth of 650 m, up to 1200 m. Studies on hydrogeochemical environment showed a normal vertical and horizontal hydrogeochemical zonation in the whole of USCB. As a general trend the level of groundwater mi...

Geochemical Processes Affecting the Mobility of Dissolved Selenium in Surface Coal Mine Backfill Environments

During surface Fadlelmawla', K.J. Reddf, and G.F. Vance3 coal mining, rock material overlying the coal is redistsibuted with respect to its original stratigraphic position. Oxidation of the redistributed backfill material may release dissolved selenium (Se) to groundwater in backfill systems. This study was initiated to examine the chemistry of Se in the groundwater backfill environment. Both b...

Effects of Redox Potential on the Speciation of Selenium in Ground Water and Coal-Mine Backfill Materials, Wyoming Katta

Extraction and Backfill Scheduling in a Complex Underground Mine

We use mathematical optimization to determine a production schedule (i.e., a schedule of extraction and subsequent filling of the voids) for a complex underground mine in Ireland. The goal of the mining operation is to maximize metal production over the life of the mine, subject to constraints on maximum monthly extraction and backfilling quantities, maximum and minimum monthly metal production...