Undercut excavation method

Details Undercut excavation method Undercut excavation method

1993-04-19

1996-06-04

Neuder, William P.

Hydraulic and earth engineering

Underground passageway, e.g., tunnel

Sectional

299111, 405149, F02D 29055

Patent

active

055226760

ABSTRACT:
An excavation method is provided, which is particularly suitable as an undercut-and-fill mining method, wherein posts are inserted into the ground and are used to support a concrete floor of the upper level which serves as a roof for the lower excavation level. Excavation beneath such roof is thereby safely carried out. Also, for mining operations, the excavation is very efficient since it removes essentially 100% of the ore in a single pass. The posts are preferably made of concrete and are inserted into holes drilled in the ground. For greater safety a double post system can be used, which involves placing a second post beside the first and tying them all together with the concrete used to make the floor/roof at any given level of excavation.

REFERENCES:
patent: 1876496 (1932-09-01), Goldsborough
patent: 3184893 (1965-05-01), Booth
patent: 3371455 (1968-03-01), Fox
patent: 3631680 (1972-01-01), Croydon
patent: 4147452 (1979-04-01), Ogasawara et al.
patent: 4459064 (1984-07-01), Berset
patent: 5137337 (1992-08-01), Seppanen et al.
The Canadian Mining and Metallurgical Bulletin, Jun. 1961, Montreal, pp. 420-424.
Mining Magazine, Nov. 1984, pp. 403-407.

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