Mine Dewatering Course

Lesson 1 • Mine Water Inflow Estimation

Teaches empirical and analytical methods for estimating water inflow rates. Accurate estimates drive pump sizing and drainage infrastructure planning.

Lesson 2 • Water Sources in Mining Environments

Identifies surface water, groundwater, and precipitation as primary inflow sources. Establishes the baseline for understanding total water load in any mine setting.

Lesson 3 • Groundwater Flow Principles

Explains Darcy's Law, hydraulic gradients, and flow net construction. Provides the quantitative basis for predicting inflow volumes and directions.

Lesson 4 • Hydrogeological Site Characterisation

Covers methods for mapping subsurface geology and water-bearing formations. Connects site data to dewatering system design decisions.

Lesson 1 • Dewatering Well Design

Details screen interval selection, gravel pack design, and well development procedures. Proper well design maximises yield and minimises sand ingress.

Lesson 2 • System Layout and Infrastructure Planning

Integrates pump stations, rising mains, and discharge routes into a coherent site plan. Addresses redundancy and phased expansion as mining advances.

Lesson 3 • Pump Selection and Sizing

Covers pump curves, system curves, and net positive suction head requirements. Correct pump selection prevents cavitation and ensures reliable dewatering capacity.

Lesson 4 • Hydraulic Design of Drainage Networks

Applies pipe flow equations and channel hydraulics to size drainage infrastructure. Ensures designed networks handle peak inflow without surcharging.

Lesson 1 • Submersible and Borehole Pumps

Covers motor-pump integration, cable management, and installation in dewatering wells. Submersible units are the primary tool for deep-well and underground sump dewatering.

Lesson 2 • Pump Control and Automation

Introduces variable-frequency drives, level sensors, and SCADA integration for automated pump control. Automation reduces labour costs and prevents sump overflow or pump dry-running.

Lesson 3 • Positive Displacement and Specialty Pumps

Examines diaphragm, piston, and peristaltic pumps for low-flow and high-head applications. Specialty pumps address conditions where centrifugal units are unsuitable.

Lesson 4 • Pump Maintenance and Troubleshooting

Details preventive maintenance schedules, wear part inspection, and fault diagnosis procedures. Proactive maintenance minimises unplanned downtime in critical dewatering operations.

Lesson 1 • Underground Monitoring and Reporting

Establishes instrumentation networks and reporting routines for continuous underground water monitoring. Consistent data collection supports trend analysis and early warning systems.

Lesson 2 • Inrush Prevention and Emergency Response

Identifies precursors to water inrush and establishes detection and response protocols. Rapid response procedures protect personnel and limit production disruption.

Lesson 3 • Drainage Drives and Adits

Examines the design and construction of dedicated drainage excavations to gravity-drain workings. Gravity drainage reduces pumping energy costs and provides passive flood protection.

Lesson 4 • Underground Water Management Planning

Establishes a structured approach to mapping water inflows and drainage infrastructure underground. Planning integrates mine development schedules with dewatering capacity requirements.

Lesson 1 • Pit Slope Depressurisation

Explains pore pressure effects on slope stability and methods to reduce phreatic levels. Depressurization is critical for maintaining safe pit wall angles.

Lesson 2 • Pit Sump and Pump Station Design

Details sump location, capacity, and pump station configuration for open-pit operations. Sump design must accommodate storm events and advancing pit geometry.

Lesson 3 • Pre-Drainage and Advance Dewatering

Covers strategies to lower the water table ahead of mining using peripheral well fields. Advance dewatering reduces inflow rates and improves geotechnical conditions.

Lesson 4 • Pit Flooding and Recovery Operations

Addresses causes of pit flooding events and systematic recovery procedures. Recovery planning minimizes downtime and prevents secondary geotechnical failures.

Lesson 1 • Discharge Compliance and Monitoring

Establishes sampling frequency, reporting formats, and corrective action triggers for discharge compliance. Systematic monitoring protects receiving environments and maintains regulatory standing.

Lesson 2 • Chemical Treatment Processes

Explains neutralization, precipitation, and oxidation for removing dissolved metals and acidity. Chemical dosing must be calibrated to variable inflow quality.

Lesson 3 • Advanced Treatment Technologies

Introduces reverse osmosis, ion exchange, and constructed wetlands for polishing treated water. Advanced methods address stringent discharge limits or water reuse targets.

Lesson 4 • Physical Treatment Processes

Covers sedimentation, filtration, and coagulation-flocculation for removing suspended solids. Physical processes form the first stage of most mine water treatment trains.

Lesson 1 • Hydrogeological Modeling and Prediction

Introduces numerical groundwater models for predicting drawdown and inflow under future mining scenarios. Model outputs guide long-term dewatering capacity planning.

Lesson 2 • Groundwater Monitoring Networks

Covers piezometer types, installation standards, and network design for tracking water table changes. A well-designed network provides early warning of adverse hydrogeological trends.

Lesson 3 • Data Acquisition and SCADA Systems

Explains sensor integration, data transmission, and SCADA dashboard configuration for dewatering. Centralized data acquisition enables real-time operational decisions.

Lesson 4 • Flow and Pump Performance Monitoring

Details flow meter types, pump performance testing, and energy consumption tracking. Performance data identifies efficiency losses and guides maintenance decisions.

Lesson 1 • Life-of-Mine Dewatering Planning

Aligns dewatering infrastructure investment with mine development phases from startup to closure. Long-range planning prevents capacity gaps and stranded infrastructure costs.

Lesson 2 • Water Balance Modeling

Constructs site-wide water balance models integrating inflows, storage, treatment, and discharge. Water balance outputs underpin regulatory submissions and operational decisions.

Lesson 3 • Cost Management and Optimization

Applies cost-benefit analysis and energy optimization techniques to reduce dewatering operating costs. Cost control without compromising safety is a key management responsibility.

Lesson 4 • Mine Closure Dewatering Considerations

Addresses post-mining water rebound, pit lake formation, and long-term water quality management. Closure planning ensures dewatering obligations are met after active mining ceases.