Continuously operating mining machines with plow and conveyor chains and method of operating same

US5647640A · kind A · utility

Assignee

• Bochumer Eisenhütte Heintzmann GmbH & Co. KG · DE

Inventors

• Peter Heintzmann · Bochum, DE
• Kuno Guse · Dortmund, DE

Key dates

• Filing date: Feb 13, 1996
• Grant date: Jul 15, 1997
• Expiry date: Feb 13, 2016

Classification

• Technology area (CPC E): Fixed Constructions
• CPC primary: E21C27/34
• WIPO field: Civil engineering
• WIPO sector: Other fields

Abstract

A mining machine especially for seam mining as in the mining of coal has a sensor for incipient sag of the plow pass of the continuously driven endless chain and a computer to which the sensor is connected and which controls the conveyor drive at the upstream end of the plow pass and the downstream end of a conveyor pass to reduce the speed of this drive until the plow pass is retensioned and any sag is accumulated at the conveyor pass. This arrangement eliminates problems with dislocation of the mining plow or of the conveyor flights as they are guided by guide devices onto the plow trough at the upstream end of the plow pass.