| Title | Development of a Continuous Drill and Blast Tunneling Concept, Phase II |
|---|---|
| Record ID | 49502 |
| Personal Name Creator |
Peterson, Carl R. |
| Source | 86p. in various pagings |
| Corporate Creator | John A. Volpe National Transportation Systems Center (U.S.) |
| Corporate Contributor |
United States. Department of Transportation. Office of the Secretary |
| Publisher | United States. Dept. of Transportation. Office of the Secretary |
| Publication Date | 19740501 |
| Language | English |
| Abstract | A spiral drilling pattern is described which offers high efficiency drill and blast tunnelling via frequent small blasts rather than occasional large blasts. Design work is presented for a machine which would stay at the face to provide essentially continuous drilling, loading, blasting and mucking. Field tests of the concept are described and photos of the spiral tunnel advance are provided. Successful testing of a suitable blast shield is also described and illustrated. Advance rates of four times conventional drill and blast practice are projected at about half the conventional cost per foot. |
| Rosap ID | dot:10944 |
| Rosap URL | https://rosap.ntl.bts.gov/view/dot/10944 |
| TRT Terms | Alternatives analysis; Automatic control; Automation; Construction; Costs; Drilling; Economic efficiency; Equipment; Field tests; Mucking; Presplitting; Tunnel shields; Tunnels; Spirals; Spoil; Tunneling |
| Classification | AGR - INFRASTRUCTURE - INFRASTRUCTURE; NTL - PUBLIC TRANSPORTATION - Rail Transit |
| Geographical Coverage |
United States |
| Report Number | DOT-TSC-OST-74-10; PB-234 204 |
| Resource type | Tech Report |
| URL | https://ntlrepository.blob.core.windows.net/lib/49000/49500/49502/DOT-TSC-OST-74-10.pdf |
| Format | |
| Database | NTL Digital Repository |