Fluidized coal mining method utilizing self-energy storage of coal seam
US12252972B1 · kind B1 · utility
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Key dates
| Filing date | Oct 31, 2024 |
| Grant date | Mar 18, 2025 |
| Priority date | — |
| Expiry date | Oct 31, 2044 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21C41/18
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A fluidized coal mining method utilizing self-energy storage of a coal seam is provided, and includes developing a mine roadway, uncovering coal actively, mining coal in fluidization, and backfilling a goaf. Dynamic phenomenon is induced by uncovering the coal actively, a coal-mining drilling well is established from a ground to the coal seam, and the coal seam is subjected to hydraulic in-situ cutting, and a coal-rock mixture subjected to hydraulic cutting flows into a roadway system along a floor roadway, and then coal, gangue and water in the mixture are separated and recycled in a subsequent circulating coal mining process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.