TY - JOUR
T1 - Type-curve analysis of water-level changes induced by a longwall mine
AU - Karaman, A.
AU - Carpenter, P. J.
AU - Booth, C. J.
PY - 2001
Y1 - 2001
N2 - 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.
AB - 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.
KW - Flow
KW - Longwall mining
KW - Subsidence
KW - Type-curves Groundwater
UR - http://www.scopus.com/inward/record.url?scp=0034992894&partnerID=8YFLogxK
U2 - 10.1007/s002540100254
DO - 10.1007/s002540100254
M3 - Article
AN - SCOPUS:0034992894
SN - 1866-6280
VL - 40
SP - 897
EP - 901
JO - Environmental Geology
JF - Environmental Geology
IS - 7
ER -