Method and an apparatus for creating a void for underground mining
US11111787B2 · kind B2 · utility
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6References
5Claims
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Key dates
| Filing date | Aug 12, 2016 |
| Grant date | Sep 7, 2021 |
| Priority date | — |
| Expiry date | Aug 12, 2036 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21C41/22
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method and an apparatus for creating a void, low-density fill or combination of void and low-density fill for underground mining having at least one module of formwork to be positioned in an open slope of an underground mine prior to carrying out a backfilling operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.