Integration between mine planning and geotechnics: Foundation for safe and efficient mining operations

Modern mining demands an integrated, multidisciplinary approach. Amid growing project complexity, increasing regulatory requirements, and pressure for sustainable profitability, the connection between mine planning and geotechnical engineering has become essential. This interface not only reduces operational risks but also enables more informed decisions, promoting safety, economic optimization, and predictability throughout the mine's lifespan.

Challenges of Separating Mining and Geotechnics

Traditionally, mining planning is structured based on geological and economic parameters, focusing on maximizing ore recovery. However, geotechnical engineering often enters the process at more advanced stages, when the project is already well-established. This separation of stages can lead to the definition of inadequate pit geometries, poorly positioned access points, overloaded slopes, or improper waste disposal, resulting in instability and significant financial impacts.

Emblematic cases around the world reinforce this reality: delays in schedules, loss of mineral resources, increased operating costs, and, in the most critical cases, accidents with severe human and environmental consequences.

Fundamental Geotechnical Variables in Planning

For the mining plan to be effectively applicable, it needs to consider several geotechnical variables, such as:

• Slope stability (maximum safe slope, berms, banks, drainage);
  
• Geomechanical properties of rock mass and soils (RMR, Q, GSI, among others);
  
• Pore pressures and subsurface drainage;
  
• Behavior of nearby structures, such as piles, adjacent pits and civil structures;
  
• Geotechnical zoning and sensitivity to climate or seismic changes.
  

Without knowledge of these parameters, the mining project tends to be designed with simplified premises, far from the physical reality of the land.

Insertion of Geotechnics in the Initial Stages

Therefore, geotechnical work must be included in the initial stages of mining design, contributing as a strategic driver for:

• Definition of the final pit geometry based on adequate safety factors;
  
• Analysis of alternatives for optimizing access, ramps and shoulders, considering stability and economy;
  
• Prediction of deformations and settlements in operational areas and auxiliary structures;
  
• Development of continuous risk monitoring and management strategies.
  

This approach significantly reduces rework in the field and the risk of interruptions due to unexpected failures, in addition to being essential for technical and environmental approval of the project by regulatory agencies.

Best Practices for Integration

Therefore, the integration between planning and geotechnical engineering must be structured. Some best practices include:

• Collaborative modeling and simulation environments, with data shared in real time;
  
• Multidisciplinary teams working continuously, from the design phase to decommissioning;
  
• Regular reviews of the mining plan based on updated geotechnical monitoring data;
  
• Use of integrated technologies, such as 3D modeling software, GIS, sensors, and risk management platforms.
  

Benefits of Integration

Consistent application of this integration results in concrete benefits: