Equipment system for no-roadway no-coal-pillar retained roadway mining method
US11008860B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 24, 2016 |
| Grant date | May 18, 2021 |
| Priority date | — |
| Expiry date | Jun 24, 2036 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21D23/0481
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An equipment system for a self-retaining mining method mainly comprises a transition support, an end support, a following support, and a fast-retracting support. Working face gateroads do not need to advance in mining, and a coal mining machine may be used to cut a neat coal wall at the end of a district. The entry rib is automatically formed after roof caving, thus forming a gateroad in a re-mining process. The coal mining machine is under digital control when its end cuts the coal, automatically enabling the end to laterally cut the coal wall to form a vertical straight line, which is used as the entry rib of the gateroad. A scrapper conveyor works in coordination with an arc-shaped coal grabbing plate of the coal mining machine to clean up float coal at the end as much as possible.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.