Excavations & Open Pit Mines

GeoStudio provides comprehensive tools for analyzing excavations & open pit mines.

The analytical challenge


Excavations cover a broad range of geotechnical engineering from building construction to open pit mining and can be the basis for a wide range of analyses. Common to all issues in this category are the release of insitu stresses when the soil or rock is unloaded. In addition, the presence of water in the ground or free water on the surface can greatly change the excavation behaviour from a seepage and stability perspective.

The GeoStudio solution


GeoStudio establishes insitu stresses and pore-water pressure conditions so that upon removal of the ground, rebound displacements can be computed. Steady state or transient pore-water flow systems can be simulated and incorporated into dewatering and stability evaluations. Detailed stress paths can be monitored during transient changes in pore-water pressure. In an advanced analysis, a slope failure in a pit can be accounted for as a result of a sudden collapse of unstable ground. A dynamic earthquake analysis assesses potential for generation of excess pore-water pressures in the ground or plastic deformation due to stress-redistribution.

Example analyses

Explore these GeoStudio analyses of excavations & open pit mines

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Excavation Below Water Table

This example is about making an excavation below the watertable. The prime objective is to look at the change in pore-pressures and the possibility of creating negative pore-pressures due to the unloading. A secondary purpose is to demonstrate and check on the use of a moving hydraulic boundary condition on the excavation face.

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Braced Deep Excavation in Soft Ground

Halim and Wong's paper in Underground Singapore 2005 presents six case histories where deflections of the shoring walls were measured during construction. The case histories show that GeoStudio has the capabilities to model the behavior of deep shored excavations in soft ground.

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Rock Joint and Rock Mass Shear Strength Models

SLOPE/W can be used to model the stability of rock slopes using various strength models such as the Barton and Choubey (1977) and Miller (1988) for rock joints or the anisotropic function to model rock mass with linearly anisotropic strength.

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Progressive Failure in London Clay

The primary objective of this example is to demonstrate how the coupled formulation in SIGMA/W can be used to simulate the excavation process and associated time-dependent pore-water pressure response and deformations (i.e. swelling).

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Related products

GeoStudio includes five integrated products that work in combination to provide effective analysis of excavations & open pit mines.

 

SLOPE/W

Stability analysis of soil and rock slopes.

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SEEP/W

Finite element analysis of groundwater flow in saturated / unsaturated porous media.

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SIGMA/W

Finite element stress and deformation analysis of earth and structural materials.

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QUAKE/W

Finite element analysis of earthquake liquefaction and dynamic loading.

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TEMPW

Finite element analysis of heat transfer and phase change in porous media.

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Explore all solutions

GeoStudio's integrated products enable you to work across a broad range of engineering use cases.