Updated: Oct 29
Understanding how the ground moves across a mining operation is critical to identifying potential risks, protecting infrastructure, and supporting safer operations.
InSAR (Interferometric Synthetic Aperture Radar) uses satellite radar technology to detect ground movement with millimetre-level precision, providing valuable insights into deformation across open pits, waste rock dumps, tailings storage facilities, subsidence zones and mine closure areas.
By capturing movement across vast and often inaccessible areas, InSAR gives mine operators a more comprehensive understanding of ground behaviour, complementing conventional monitoring methods and supporting earlier, more informed risk management decisions.
How does InSAR monitoring improve mining risk management?
InSAR monitoring for mining can improve risk management by identifying deformation before it becomes visually obvious, operationally disruptive, or hazardous.
Satellites revisit the same mining area at regular intervals, allowing analysts to compare radar phase differences and map movement through time.
This is especially valuable where slope instability, subsidence, or tailings dam deformation may evolve gradually before accelerating.
The principal advantage is not simply remote observation; it is continuity over broad terrain. A mine may contain active highwalls, haul roads, stockpiles, pit lakes, waste rock dumps, processing infrastructure, and surrounding communities.
InSAR can observe large and inaccessible areas without installing instruments on every feature, making it a powerful complement to field mapping, prism monitoring, inclinometers, piezometers, total stations, UAV surveys, and ground-based radar.
Practical applications of InSAR across the mine life cycle
InSAR supports several core mining risk and compliance activities. During exploration and development, it can contribute to baseline terrain assessment and help distinguish pre-existing natural movement from mining-induced displacement. During production, it supports surveillance of pit slopes, bench-scale deformation trends, and settlement around infrastructure corridors.
For tailings dam monitoring, InSAR can help identify differential settlement, embankment movement, or deformation around storage facilities. It should not replace engineering inspections or instrumentation, but it can indicate where inspection intensity should increase.
During mine closure, historical InSAR archives can be particularly valuable because they allow retrospective analysis of long-term deformation, including abandoned mine subsidence, rehabilitated waste dumps, and post-closure landform performance.
Common mining applications include:
Slope stability monitoring: detecting slow displacement on pit walls, benches, and waste rock dumps.
Tailings storage facility assessment: identifying settlement or lateral movement requiring engineering review.
Subsidence mapping: tracking ground movement above underground works or dewatered formations.
Infrastructure protection: monitoring haul roads, conveyors, rail links, pipelines, and processing areas.
Closure and rehabilitation: assessing whether landforms remain stable after active mining ends.
A more holistic view of mining risk with for·see Mining
While InSAR provides valuable insight into ground movement and deformation, understanding mine-wide risk requires an even broader perspective.
Geofem's for·see Mining brings together multiple layers of satellite-derived intelligence to provide a more complete picture of geotechnical, environmental and operational risks across your mining operation.
From ground movement and tailings intelligence to soil moisture intelligence, seepage, water and environmental insights, for·see Mining enables operators to assess varying risks across critical assets, including open pits, tailings storage facilities, waste rock dumps, haul roads, pipelines and surrounding infrastructure.
Combining advanced satellite technology, data analytics and expert geotechnical interpretation, for·see Mining goes beyond conventional monitoring.
By bringing together complementary datasets and evaluating them within the wider operational context, it helps mining teams identify emerging risks, prioritise investigations and make more informed, proactive decisions.
The result is a more connected, risk-informed approach to mine management — supporting safer, more resilient and more efficient mining operations.
How is the data Geofem interprets turned into operational decisions?
InSAR becomes operationally useful only when radar outputs are interpreted with geotechnical context.
Raw displacement maps contain atmospheric effects, vegetation decorrelation, snow or water interference, satellite geometry limitations, and other noise sources. Expert interpretation separates measurement artefacts from deformation that is spatially coherent, temporally persistent, and geologically plausible.
A robust workflow usually follows a disciplined sequence:
Define the mining hazard: slope failure, tailings deformation, subsidence, or infrastructure settlement.
Select suitable radar data: considering wavelength, revisit frequency, viewing geometry, and historical archive depth.
Process displacement time series: identifying velocity, acceleration, seasonal behaviour, and anomalous zones.
Compare with ground evidence: integrating geotechnical mapping, instrumentation, rainfall, blasting, dewatering, and excavation records.
Assign action levels: using traffic-light thresholds, inspection triggers, engineering review points, or exclusion protocols.
Review continuously: refining alerts as new satellite passes, field observations, and operational changes become available.
The lesson is methodological: the greatest value emerges when remote sensing mining data is embedded inside a decision system, not treated as a standalone product.
Benefits compared with ground-based monitoring
Traditional mining monitoring is indispensable because it measures conditions directly at engineered locations. However, it is spatially selective, may require access to hazardous ground, and can be expensive to extend across every slope, dump, or subsidence-prone area.
InSAR adds regional coverage, historical perspective, and repeatable measurement without onsite deployment.
The cost benefit is often logistical rather than simplistic instrument replacement. By screening broad areas, InSAR helps teams prioritise where to place prisms, inclinometers, piezometers, survey campaigns, or ground-based radar. This reduces blind spots and supports more defensible allocation of monitoring resources.
Key takeaway
InSAR monitoring is a powerful tool for understanding ground movement across mining operations, but its greatest value emerges when combined with complementary intelligence and engineering expertise.
Through integrated approaches such as Geofem's for·see Mining, satellite-derived insights can support a more holistic understanding of mine-wide risk, helping operators move beyond monitoring towards earlier intervention and more confident, evidence-based decisions.
Ready to see the bigger picture?
Discover how for·see Mining can help you gain a better understanding of risk across your mining operation, identify emerging challenges and make more informed decisions.
Explore for·see Mining or get in touch with our team to discuss your monitoring and risk management needs.