Hydraulic characterisation and conceptual modelling of the Excavation Disturbed Zone (EDZ)
An in-depth conceptual understanding of the hydraulic conditions nearby and in the surroundings of an underground facility is a multi-disciplinary task. The (A)sp(o) Hard Rock Laboratory (HRL), Sweden provides an opportunity to explore the parameters of importance for understanding the development and characteristics of the Excavation Damaged Zone (EDZ). Detailed characterisation and modelling of the geometry of the blast induced fractures in crystalline rock that forms the flowing system indicate weakly connected flow paths. However, there may be special hydraulic effects in relation to the open boundary of the tunnel wall. Even though the focus of a repository for nuclear waste deals with long term saturated flow in the postclosure phase, there is a need to understand the physical and chemical evolution in the bedrock in a broad perspective. The hydraulic conditions in the vicinity of the tunnel are dependent on the excavation method, as well as the construction materials used during tunneling. Recently developed methodologies for designing grouting schemes regarding hydraulic testing, determination of fracture transmissivities and fracture connectivity provide guidance on how to model the hydraulic aspects of the EDZ.
R.Christiansson L.O.Ericsson G Gustafson
Swedish Nuclear Fuel and Waste Management Co, Stockholm, Sweden Division of GeoEngineering, Department of Civil and Environmental Engineering, Chalmers University o
国际会议
香港
英文
1-5
2009-05-19(万方平台首次上网日期,不代表论文的发表时间)