Hydrogeologic Aspects of Coal Mining in Illinois: An Overview

摘要

Water has generally not been a significant problem in Illinois mining, although most Illinois coal mines lie partly or completely below the water table. Water-related problems in and around mines are likely to increase as it becomes economically feasible to open or expand surface mines in areas with thicker and more permeable overburden and to place underground mines at greater depths. Detailed study of the hydrogeology of mining areas before, during, and after mining can help prevent problems that may occur. Such analysis should include: (1) a study of the topography of the land surface and patterns of surface flow; (2) the identification and characterization of aquifers in the glacial drift and in the bedrock; (3) an estimate of the effects of surface or ground water flow on mining; and (4) an evaluation of the effects of mining on surface streams and on aquifers.