Grouting bolt-cable composite beam and supporting method for advanced support of fractured surrounding rock in deep coal mines
US11078791B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 3, 2020 |
| Grant date | Aug 3, 2021 |
| Priority date | — |
| Expiry date | Dec 3, 2040 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21D21/0093
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
It discloses a grouting bolt-cable composite beam and supporting method for advanced support of fractured surrounding rock in deep coal mines. The quadrate plates are fixed at both ends of the steel beam, the anchor cable holes are arranged in the center of the steel beam and the quadrate plates, and the diameter of anchor bolt holes should be larger than that of the grouting cables. There are four anchor bolt holes on each quadrate plate, and each anchor bolt hole corresponds to a anchor plate, the horizontal surface of the anchor plate is close to the quadrate plate, and the arc parts of the four anchor plates are all facing the center of the quadrate plate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.