Mine ventilation control device
US4009649A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 2, 1976 |
| Grant date | Mar 1, 1977 |
| Priority date | — |
| Expiry date | Apr 2, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S277/917
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The invention relates to a mine stopping for underground mines which may be readily mounted within a mine airway to form a gas-tight seal to control the flow of fresh air to the working face of the mine and the efficient exhaust of dirty gas laden air from the working face. The stopping is typically formed of a flexible, gas impervious, fire resistant sheet material provided with means for mounting the same within the interior of the mine. The mounting means embody inherent characteristics of permitting the main body of sheet material to separate from the mine interior walls upon the occurrence of a certain predetermined pressure difference between the opposing major surfaces of the main body of the stopping as may occur by a blasting or underground explosion. Thereby the main body portion of the stopping is not damaged and may be reused.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.