Shaft Mine Asse II, Excavation Management

Client

Asse GmbH
Am Walde 1
38319 Remlingen
(on behalf of Federal Office for Radiation Protection)

Contractor

BeMo Tunnelling GmbH Deutschland
in joint venture “ALM”
BeMo 50 % in JV (technical direction)
Feldhaus Bergbau GmbH & Co.KG (commercial management)

Project location

Shaft Mine Asse II
Remlingen, Niedersachsen
Germany

Start of construction

2014

End of construction

2017

Project total value

5.7 million €

Geology

The Asse range consists of different types of Zechstein, a salt rock formed about 230 million years ago. Salt rocks tend to crop out in weak zones given major overburdens with overcapping layers. They formed a saddle structure in the case of the Asse range. The core of the saddle consists of older Staßfurt rock salt (dark blue).
It is overlain by the Staßfurt potash seam (carnalitite), also a salt rock and further layers of younger Leine rock salt (violet) and Anhydritmittelsalz (light blue) – comprising a mixture of rock salt and the mineral anhydrite.
Overlaying layers and adjoining mountains are mainly composed of different mottled sandstone layers (clay, sand and limestone) as well as shell lime an Keuper. The rock layers directly above the saddle are disrupted and misaligned (disrupted overlying rock).
In the south-west flank of the saddle (left part of picture) there are
numerous faults (cracks in the rock). They are shown as broken lines in the graph.

Technical Data

- Manufacturer-specific planning of facilities for delivering of up to
500 m³/d of solution
- Creating the planning and implementation documents requiring
approval
- Creating system documentation
- Training the client’s personnnel
- Supplying, assembly and commissioning of engineering systems
consisting of:
o pipelines approx. 10,600 m, DN 80, PN 64
o 3 collecting tanks each 35 m³
o 4 feed tanks each 15 m³
o 6 valve stations
o 4 feed pumps
including the appropriate measurement and control technology

Further project related information

Integration of the existing facility (delivery volume 12 m³/d) in the
upgraded system

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