Type-curve analysis of water-level changes induced by a longwall mine

A. Karaman, P. J. Carpenter, C. J. Booth

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)


Subsidence due to longwall mining creates long-term environmental effects, such as alteration of surface drainage patterns, changes in aquifer characteristics, and water-level drops in wells near the mine panel. Evaluating the impact of longwall mining on groundwater resources requires a knowledge of aquifer properties, both in front of, and behind, the mining face. In this study, we develop a method based on the one-dimensional flow equation, and utilize type-curves to estimate an aquifer hydraulic diffusivity value from water level versus time measurements at a single well. We tested the method by calculating the hydraulic diffusivity value of the Trivoli Sandstone aquifer over a longwall coal mine in the Illinois Basin, and our results are reasonably close to reported values. The presented method significantly reduces the computational effort involved in: (1) predicting mine-induced water-level drops, and (2) determining the hydraulic conductivity and storage coefficient value representative of a larger aquifer volume, as compared to conventional aquifer test methods.

Original languageEnglish
Pages (from-to)897-901
Number of pages5
JournalEnvironmental Geology
Issue number7
Publication statusPublished - 2001


  • Flow
  • Longwall mining
  • Subsidence
  • Type-curves Groundwater


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