Method of securing objects in passages and arrangement obtained thereby, particularly hose lines sealingly secured in the passages of coal mines for dust suppression

US4008576A · kind A · utility

Assignee

• Bergwerksverband GmbH · DE

Inventors

• Frank Meyer · Essen, DE
• Helmut Becker · Limeshain, DE
• Heinz Goretz

Key dates

• Filing date: Sep 9, 1974
• Grant date: Feb 22, 1977
• Expiry date: Sep 9, 1994

Classification

• Technology area (CPC E): Fixed Constructions
• CPC primary: E21F5/18
• WIPO field: Civil engineering
• WIPO sector: Other fields

Abstract

An object extends into a passage and defines a clearance space with the inner wall of the passage. A hardenable, foamable synthetic resin in flowable state is admitted into the clearance space. Upon hardening and foaming of the synthetic resin, the object is sealingly secured in the passage by the synthetic resin. In a preferred application, the passage is one provided in a coal mine and the object is a hose line for the purpose of suppressing dust. The synthetic resin is advantageously polyurethane including a polyhydroxyl component which contains a polyetherglycol having a hydroxyl number of 300 to 350 and a polyetherglycol having a hydroxyl number of 450 to 500. The polyetherglycol components respectively constitute 80 to 90 parts and 10 to 20 parts of the polyhydroxyl component. The polyhydroxyl component preferably includes a filler in an amount such that the weight of the latter at least equals that of the polyhydroxyl component.