Long-wall mining machine with a working chain

US5624162A · kind A · utility

Assignee

• Bochumer Eisenhütte Heintzmann GmbH & Co. KG · DE

Inventors

• Kuno Guse · Dortmund, DE
• Peter Kroninger · Gelsenkirchen, DE
• Bernd Holling · Bochum, DE
• Roland Becker · Gelsenkirchen, DE

Key dates

• Filing date: Oct 6, 1995
• Grant date: Apr 29, 1997
• Expiry date: Oct 6, 2015

Classification

• Technology area (CPC E): Fixed Constructions
• CPC primary: E21C35/302
• WIPO field: Civil engineering
• WIPO sector: Other fields

Abstract

A long-wall mining machine has an operating chain entraining conveyor flights or mining tools and displaceable in a trough which can be provided with rows of sensors of an inductive proximity type responding to the chain and the tools and generating measurement pulse trains which are compared with setpoint pulse trains to signal functional parameters of chain operation. The sag of the chain is determined by a row of sensors and in response to the sag a chain-tension unit can be controlled.