A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Short rounds lick mica schist on fast tunnel job
Drilling short rounds enabled successful tunneling in black mica schist; 742 ft of tunnel at Tuckasegee River in North Carolina was driven in 20 working days from single heading; between 200 and 250 lb of gelatin were loaded in 52 holes; tunnel is ventilated by blowers supplemented by fans.
Short rounds lick mica schist on fast tunnel job
Drilling short rounds enabled successful tunneling in black mica schist; 742 ft of tunnel at Tuckasegee River in North Carolina was driven in 20 working days from single heading; between 200 and 250 lb of gelatin were loaded in 52 holes; tunnel is ventilated by blowers supplemented by fans.
Short rounds lick mica schist on fast tunnel job
Construction Methods Equipment
Perez, H.T. (author)
1953
4 pages
Article (Journal)
English
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