Method and device for carrying out grouting between adjacent gateroads in internal-staggered split-level coal mining
US11959383B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 24, 2022 |
| Grant date | Apr 16, 2024 |
| Priority date | — |
| Expiry date | May 24, 2042 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21D20/028
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method for carrying out grouting between adjacent gateroads in internal-staggered split-level coal mining. A return air gateroad of a stoping face and an inlet air gateroad of a heading face are not on the same level. The return air gateroad of the stoping face is arranged along a roof of a coal seam. The inlet air gateroad of the heading face is arranged along a floor of the coal seam. There is a height difference between the return air gateroad and the inlet air gateroad in a vertical direction. During the construction process, the inlet air gateroad is excavated at a delay distance of 180-200 meters from the return air gateroad. The drilling and grouting are performed while excavating the roadway, where grouting holes are arranged in a single row. A device for implementing the method is also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.