Method of reinforcing rock strata
US3987635A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 1, 1976 |
| Grant date | Oct 26, 1976 |
| Priority date | — |
| Expiry date | Apr 1, 1996 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21D21/0006
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method of reinforcing rock strata, such as that around underground openings in mines, is effected by using a first wooden reinforcing dowel to drive a second wooden reinforcing dowel into contact with resin capsules located at the inner end of a borehole. The first dowel is then removed from the borehole while additional resin capsules are positioned in the borehole and a further wooden dowel is then inserted into the borehole so as to become embedded in mixed resinous composition from the additional capsules. In this manner it is possible to reinforce the strata to a considerable depth, for example upwards of 16 feet, without the danger of metallic drill rods becoming jammed in the borehole and thereby obstructing subsequent cutting of the reinforced strata by mining machinery.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.