Hydromechanical behaviour of fractures in-situ: Conceptual model and field data analysis

Start date 01/01/2013
End date The project is closed: 31/12/2015

​The aim of the proposed research project is to investigate the hydromechanical behaviour of fractures in-situ. Changes in hydraulic properties due to deformation may result in increased flow and unstable rock conditions. This is expected to be particularly true at shallow depth, for soil-rock interfaces and for fracture zones.

The specific objectives of the proposed research project are:

  • To investigate possibilities and limitations using the storage coefficient (ability of a fracture to store or release water) as a basis to estimate fracture stiffness. 
  • An increased general (and fundamental) understanding of hydromechanical fracture behaviour due to normal deformation and shearing in-situ. 
  • A relevant conceptual model including processes, fracture geometry and boundary conditions. 
  • An analysis based on field data to verify the conceptual model. Fracture stiffness estimated from storage coefficient (and hydraulic tests) has potential to be a very valuable data-set for comparison and calibration of (hydro)mechanical models, this is a scientific gap today. Understanding of hydromechanical behavior is important for tunneling, grouting design, nuclear waste storage and for design and maintenance of rock foundation below hydropower dams.

 

The project is carried out at the Division fof GeoEngineering, reserach group Engineering Geology.

Keywords: hydromechanical, fractures, in-situ, storage coefficient, fracture stiffness

Project members
​Åsa Fransson
Chalmers Areas of Advance
​Built Environment
​Formas

Page manager Published: Mon 28 Oct 2013.