ABSTRACT
Due to the latest studies of excavation damaged and disturbed zones three different zones are distinguished (see Figure 1):
• Excavation disturbed Zone or Excavation Influence Zone (EdZ or EIZ), which is a zone with hydromechanical and geomechanical modifications, without major changes in flow and transport properties. Stress and/or strain in EdZ zone involves only elastic change and EdZ is situated beyond the EDZ. The pore volume may be affected close to the EIZ-EDZ transition by the elastic strain.
