Models for open pit mine dewatering
Thesis/Dissertation
·
OSTI ID:6761398
A new analytical model was developed to analyze the relationship between system discharge and drawdown for open pit mine dewatering problems in aquifer sytems under confined, unconfined, and leaky aquifer conditions. The model was developed by using the Cooper-Jacob approximation of the Theis well function and the principle of superposition for multiple well systems in a homogenous confined aquifer, by using the steady-state approach of the Hantush method and the principle of superposition for multiple well systems in a homogenous steady-state leaky aquifer, and by using the Cooper-Jacob approximation, the principle of superposition for multiple well systems, and the Girinski potential theory in an unconfined stratified aquifer. The analytical model is capable of handling various pumping schemes and spatial arrangements of the well row systems for open pit mine dewatering. The model is used to construct the system discharge vs. drawdown curves for a designed dewatering system in homogenous confined aquifer and homogeneous unconfined aquifer systems under a wide range of transmissivities and hydraulic conductivities, respectively. A three dimensional finite difference model developed by Trescott was adapted and modified to simulate the open pit mine dewatering in complex aquifer systems. The numerical model also served as a calibration and testing tool for the analytical model.
- OSTI ID:
- 6761398
- Country of Publication:
- United States
- Language:
- English
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