Multipartite rock bolt

US4171924A · kind A · utility

Assignees

• Bergwerksverband GmbH · DE
• Saarlandische Gesellschaft fur Grubenausbau und Technik mbH · DE

Inventors

• Fritz Schuermann · Hattingen, DE
• Johannes Neubauer · Essen, DE
• Gunther Kirz · Alsweiler, DE
• Heinz Fuchs · Homberg (Efze), DE

Key dates

• Filing date: Feb 17, 1978
• Grant date: Oct 23, 1979
• Expiry date: Feb 17, 1998

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T403/655
• WIPO field: Civil engineering
• WIPO sector: Other fields

Abstract

A multipartite rock bolt includes a plurality of individual discrete elems which are connected to each other at their respective end portions to constitute the rock bolt which is anchored, especially cemented, in a hole of the rock to be consolidated by the rock bolt. The end portions of the elements have complementary recesses therein at which the respective assembled elements overlap each other and the connecting arrangement for connecting the respective end portions includes a projection, particularly a pin which extends transversely of the elongation of the element into the recess and is received in a complementary aperture, particularly a hole, provided at the recess of the other element. The recess is partially bounded by a detaining surface extending substantially longitudinally of the element, and the detaining surface may be inclined relative to the elongation of the element.