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Muuga PHAJ heakskiidetud KSH programm - Energiasalv

Muuga PHAJ heakskiidetud KSH programm - Energiasalv

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HOW ARE TUNNELS EXCAVATED INTO<br />

GRANITE?<br />

Work cycle<br />

1. (Pregrouting)<br />

2. Drilling<br />

3. Blasting<br />

4. Loading<br />

5. Support<br />

• Tunnel boring machines (TBM)<br />

• Are used for long horizontal<br />

tunnels. Not applicable here.<br />

TYPICAL TUNNEL PROFILES<br />

Width 3-7 m<br />

Side wall 2-5 m<br />

Access tunnel<br />

Cavern<br />

Posiva Oy/Jussi Partanen<br />

Width 10-30 m<br />

Sidewall 2-20 m<br />

Crown<br />

Side wall<br />

2

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