Rock-bolt stabilizer device for mining and tunneling applications
US4648753A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 25, 1985 |
| Grant date | Mar 10, 1987 |
| Priority date | — |
| Expiry date | Apr 25, 2005 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21D21/0033
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A rock bolt stabilizer device which can be arranged in boreholes for stabilizing rock and similar host environments in mining and tunneling. The device is adapted to perform the function of a rigid profile anchor under predetermined stress conditions, and is also adapted to perform the function of an expansion anchor under given stress conditions. The device generally comprises an anchor member with mix end which can be secured near the base of the respective borehole by means of a cementitious composition. For tensioning, the other end of the anchor member can carry a bearing plate, a spacer, and a fastener for tensioning. The device also includes a sleeve which performs the function of a rigid anchor, and the sleeve substantially surrounds the anchor member. An increased armoring and anchoring efficiency is achieved with the device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.