Description
Fracturing of bedrock due to high stresses or stress concentrations.
SKB Number
SKB FEP Number
Ge07
Main Category
Main category for FEP
Internal process
System Component
System component to which the FEP applies
Geosphere
Handling
Explanation of how the FEP is treated
Excavation/operation: Assessment of EDZ.
3DEC modelling of potential for spalling. Observations of size and shape of fractured (spalled) zone around deposition holes.
Temperate: 3DEC modelling of potential for spalling. Observations of size and shape of fractured (spalled) zone around deposition holes.
Periglacial: Thermal effects modelled and neglected provided that only marginal changes in mechanical state occur.
Assessment of hydraulic fracturing under impermeable permafrost layer.
Glacial: 3DEC modelling of potential for fracturing induced by ice load (near field).
Assessment of risk of hydraulic fracturing.
Earthquakes: Neglected based on lack of observations at relevant distances from earthquake faults of earthquake-induced damage around open tunnels at shallow depth.
References
Bibliographic references to obtain more information
SR-Site Geosphere process report, TR-10-48, Section(s) 1.6, 4.4; SR-Site Main report, TR-11-01, Section(s) 7.4.5