GROUNDWATER DEWATERING

Groundwater Dewatering is often required for excavation projects, where the impact of partial or total dewatering of the material is critical for a dry and safe working environment, as well as improving wall stabilities. Typically, this would include open and underground mining or large scale construction workings. Dewatering in the mining industry is frequently used for processing water, while out-of-mine dewatering can prevent contamination of Groundwater.

GCS provides comprehensive services in terms of feasibility evaluations as well as detailed design, management and monitoring of dewatering systems.

The success of Dewatering Studies is heavily reliant on the accurate and comprehensive quantification of aquifer characteristics through aquifer (pump) testing, packer tests or tracer tests.

A comprehensive geophysical investigation of the area is usually performed to identify preferential groundwater flow paths that will be targeted when installing the dewatering points.

Numerical groundwater flow modelling is applied to determine the optimal dewatering approach. Several options are evaluated and the optimal approach from in-pit, out-of-pit, or a combination of both is assessed and the best option identified.

Various dewatering point designs are evaluated, including vertical and inclined boreholes and horizontal drains. Well field spatial layout, borehole depths, and borehole equipment are evaluated and designed.

Dewatering lead times and depths are calculated to allow for comprehensive dewatering of the soil and rock material prior to excavation. Monitoring and continual management are also critical to the success of the dewatering operations.

GROUNDWATER DEWATERING PROJECT DATA

YEARCLIENTPROJECTOPERATION
2013Africa Barrick BulyanhuluMine Dewatering SimulationBulyanhulu Gold Mine
2013 to currentAfrican Nickel South AfricaMine Dewatering and Contaminant Plume SimulationJacomynspan
2010 to currentNkomati MineMine Dewatering and Integrated Water Management PlanNkomati Mine
2013 to currentLamical / ManagemMine Dewatering SimulationNorth Pumpi Mine
2013Witkop Exploration and Mining (Pty) LtdMine Dewatering and Contaminant Plume MigrationWitkop Colliery
2013 to 2015Anglo American (Kumba Iron Ore)Mine Dewatering SimulationThabazimbi Mines
2014Gold One International LimitedMine Dewatering SimulationCooke 2 Gold Mine
2014 to 2015Royal Bafokeng PlatinumMine Dewatering SimulationStyldrift Platinum Mine
2013-2014Two Rivers PlatinumMine Dewatering and Contaminant Plume MigrationTwo Rivers Platinum Mine
2012-2013Gauteng Provincial GovernmentTunnel Dewatering and
Environmental Impact
Gautrain court case
2013-2014MetorexDewatering Management and
Numerical modelling
Kinsenda Mine
2012-2013Chemaf S.P.R.LDewatering ManagementEtoile Mine
2013-2014Kumba Iron OreGroundwater Impact assessments, Dewatering Management and Numerical ModellingThabazimbi Mines
2014ARMDewatering ManagementModikwa Mine
2012-2014ENRCDewatering Management and
Numerical Modelling
Modikwa Mine

Attachments

  1. Groundwater Dewatering (622.7 KB)
    Download this Product Data Sheet