Geomechanics and Resources Geotechnical Engineering

Geomechanics and resources geotechnical engineering explore how soils and rocks respond to natural and engineered forces, with applications ranging from mining and tunnelling to hydrocarbon and groundwater management. The field addresses subsurface deformation, stability and fluid–structure interaction in contexts such as ground subsidence above extractive operations, induced seismicity, reservoir compaction and wellbore integrity. By integrating laboratory characterisation, field monitoring and numerical simulation, practitioners develop predictive models for phenomena including fracture propagation, poroelastic deformation and coupled thermo‐hydro‐mechanical behaviour. Resource‐oriented geotechnics also encompasses the design of engineered barriers for waste containment, optimisation of hydraulic stimulation in low‐permeability reservoirs and assessment of caprock sealing capacity for carbon storage. Through a systems approach, this discipline underpins safe infrastructure development, efficient resource recovery and the mitigation of geohazards in both urban and remote settings.

Research from Nature Portfolio

Advances in mine‐induced subsidence prediction have combined physical modelling, analytical theory and in situ observation to refine overburden deformation forecasts. In shallow coal panels, researchers delineated distinct structural zones—boundary‐pillar F-shape, trapezoid goaf and inverted trapezoid pillar—each controlling rock movement. Calibrated against field settlements, these models now predict surface subsidence within decimetre accuracy and inform land‐use planning and infrastructure design.

Work on carbonate reservoir heterogeneity has employed high‐resolution digital imaging and mercury‐injection data to derive multifractal parameters that correlate strongly with measured porosity. Spectrum width and asymmetry metrics enable quantitative differentiation between homogeneous and highly heterogeneous samples, improving characterisation of fluid pathways and informing enhanced recovery strategies.

The capillary‐pressure–saturation response of fractured rock masses has been elucidated by numerical invasion percolation experiments on digital fracture analogues. Findings show scale‐independent normalised curves, Gaussian aperture distributions and shear‐induced anisotropy. Integrating fracture and matrix behaviour yields rock‐mass capillary curves that capture entry pressure and residual saturation, supporting seal assessment for fluid containment.

Geomechanics and Resources Geotechnical Engineering publication trend

The graph below shows the total number of articles in geomechanics and resources geotechnical engineering across all publications each year (not limited to Nature Index journals).

Technical terms

Subsidence: Gradual ground‐surface lowering caused by removal or compression of subsurface materials such as coal or groundwater.

Capillary pressure curve: Relationship between fluid saturation and pressure difference across a fluid–fluid interface in pore throats, governing entry and retention of non‐wetting phases.

Hydraulic fracturing: Injection of pressurised fluid into a reservoir to create or extend fractures and enhance permeability.

Multifractal spectrum: Set of fractal dimensions describing the heterogeneity of pore or aperture distributions across scales.

Transversely isotropic compliance: Elastic model for materials with one axis of symmetry, used to capture directional stiffness contrasts in layered rocks.

Threshold capillary pressure: Minimum pressure required for a fluid to invade and propagate through a sealing rock layer.

Mud weight window: Range of drilling fluid densities that maintain wellbore stability without fracturing the formation or collapsing the borehole walls.

References

1. Subsidence prediction of overburden strata and ground surface in shallow coal seam mining. Scientific Reports (2021).
2. Experimental and digital investigations of heterogeneity in lower cretaceous carbonate reservoir using fractal and multifractal concepts. Scientific Reports (2023).
3. The capillary pressure vs. saturation curve for a fractured rock mass: fracture and matrix contributions. Scientific Reports (2023).
4. Influences of clean fracturing fluid viscosity and horizontal in-situ stress difference on hydraulic fracture propagation and morphology in coal seam. International Journal of Coal Science & Technology (2024).
5. Threshold capillary pressure of caprocks for CO2 storage: Numerical insight on the dynamic and residual method. International Journal of Greenhouse Gas Control (2024).
6. Investigation of collapse pressure in layered formations based on a continuous anisotropic rock strength criterion. Geomechanics and Geophysics for Geo-Energy and Geo-Resources (2023).