Patent · US Expired

Method for reducing compressed air losses when driving underground cavities supported by compressed air

US4623198A · kind A · utility

1Cited by

8References

17Claims

0Family size

Assignee

Ed. Zublin Aktiengesellschaft · DE

Inventors

Manfred Nussbaumer · Leonberg, DE
Theo van Lith · Stuttgart, DE

Key dates

Filing date	Apr 19, 1984
Grant date	Nov 18, 1986
Priority date	—
Expiry date	Apr 19, 2004

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE21F17/00
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

A method for reducing compressed air losses when driving underground cavities which are supported by compressed air. The part of the inner cavity face exposed by mining is sealed by a viscous medium after breaking away the earth. With a supply of propellant, the viscous medium is applied, in the form of a spray mist which is directed toward the exposed part of the inner cavity face, in such a way that the mist penetrates the substratum without substantially destroying the exposed face. Particles of rock are thus prevented from being detached from the face which is to be sealed.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.