Fire-prevention and extinguishing material for plugging air leakage in underground barrier pillar of coal mine and use method thereof
US12326087B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 11, 2024 |
| Grant date | Jun 10, 2025 |
| Priority date | — |
| Expiry date | Dec 11, 2044 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21D11/38
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The present disclosure provides a fire-prevention and extinguishing material for plugging an air leakage in an underground barrier pillar of a coal mine and a use method thereof. The fire-prevention and extinguishing material for plugging the air leakage includes an upper fabric layer, an intermediate layer, and a lower fabric layer. A plurality of fiber filaments are evenly distributed in the intermediate layer such that the intermediate layer has a flexible deformability. The intermediate layer is filled with a cement powder. The upper fabric layer is made of a flame-retardant flexible material. The upper fabric layer is configured to deform under a pressure to block off oxygen and plug the air leakage in the underground barrier pillar. The lower fabric layer is made of a water-soluble material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.