Sunday, July 19, 2009

Niagara Tunnel Chuggin'

The tunnel is very interesting at the mid-point of the sandstone layer (I think!). Note the high-stress spalling at the top. And they are using steel sets and mesh. I wish we had micro-seismicity monitoring here. We'd probably hear a lot of snap, crackle and pop! I wonder if they will continue to rise through the sandstone, and what will happen when they get near the top.

No comments: