Method for radially mining open-pit end slope pressed coal
US11377952B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 8, 2019 |
| Grant date | Jul 5, 2022 |
| Priority date | — |
| Expiry date | Oct 8, 2039 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21F1/04
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Provided is a method for radially mining open-pit end slope pressed coal, including: L-shaped or U-shaped main tunnel arrangements, and radially mining; branch tunnels are formed by excavating tunnels in directions perpendicular to or obliquely crossing the main tunnel from the L-shaped or U-shaped main tunnel; In the mining method, a coal mining system and a transportation system both adopt a remote control mode, a tunneling machine excavates a tunnel to product coal; a rubber belt conveyor conveys coal; the main tunnel adopts an exhaust ventilation mode, the branch tunnels adopt a blowing ventilation mode; the lengths of the branch tunnels do not exceed a farthest control distance of a remote control system; the length of each main tunnel needs to ensure that all the end slope pressed coal is mined under the premise that the branch tunnels do not exceed the farthest control distance of the remote control system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.