Shaft Konrad 2

Rehabilitation and development of the shaft and excavation of connected mine chambers

Client

BGE (Bundesgesellschaft für Endlagerung mbH)

Organization

ARGE Schacht Konrad 2 (ASK2)

Location

Salzgitter, Germany

Execution period

2010

until approx. 2028

Project objective
Shaft Konrad 2 is being prepared for the final repository for radioactive waste with negligible heat generation. The work is being carried out in the former Konrad iron ore mine in Salzgitter. The aim is to refurbish the shaft and excavate adjacent mine workings.

Conrad 2 — Konrad 2 - Miners before Blindort

ASK_3 — Konrad 2 - Inner shell lower shaft collar

Project details

Scope of order

Driveway from:

Loading pocket 850 m and 1000 m level
Loading station extension drift
Branch to connect the filler expansion section and storage transport section
Storage transport route north
Shaft extension in the area of the 850 m level

Other commissioned services:

Preparation and revision of all necessary approval and implementation plans
Planning, delivery, assembly and dismantling of all above-ground and underground construction site facilities
Installation of temporary conveyor systems (e.g. platform system, emergency drive system),
Investigation of the masonry
Renovation of the shaft lining
Filling location on the 2nd level
Upgrading of the filling location on the 3rd level
Cross-section widening on the 2nd level
Partial excavation of the storage transport route
New construction of the shaft cellar (lawn suspension bench area) incl. weather channel
Placement of the shaft installations for later repository operation

Technical data

Zweigeteilte Ausführung mit Kalotte und Sohle

	FOE	FOE/ETS	ETS
Length (m)	35	20	40
Width (m)	11	20	9
Height (m)	9	9	8
Breakout cross-section (m²)	≥ 80	≥ 80	≥ 70

Expansion:

3 cm consolidation layer
1 anchor per m2 L=2 m GRP anchor Powerthread K60-25
20 cm slotted shotcrete shell

Special features

Very high demands on documentation and quality assurance
Daily working hours severely limited by ongoing mine operations

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