The Rock is Re­moved by Blast­ing

Bor­ing ma­chines and dy­na­mite will be used to re­move about 8 mil­lion t of rock to com­plete the new tun­nel. More­over, four res­i­den­tial prop­er­ties and sev­eral barns are sac­ri­ficed to al­low space for the con­struc­tion work.

Science Illustrated - - SCIENCE UPDATE -

1 The bored up­per­out just part likeof the in tun­nelany other will tun­nelbe con­struc­tion pro­ject. Bor­ing is car­ried out si­mul­ta­ne­ously from both sides. 2 Sub­se­quently, the un­der­ly­ing rock lay­ers are re­moved by blast­ing, layer by layer, and car­ried away by boat. 3 To pre­vent wa­ter from en­ter­ing, the ex­te­rior part of rock re­mains as a plug, which is re­moved, once the rest of the tun­nel has been com­pleted.

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