Bochumer Eisenhütte Heintzmann Gmbh&co. Kg

Strebtechnik Bochum Gmbh & Co.

Peter Kroninger

Kuno Guse

Hans-Ferdinand Bemmerl

Alfred Bollmann

Alois Scheunert

Bernd Holling

Peter Rose

Roland Becker

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.

Long-wall mining machine with a working chain

A walking mining prop has a skid-lifting assembly in the region of the ram which braces the roof cap with respect to the skid formed by a bridge from which lifting cylinders are articulated and suspended. The pistons of these lifting cylinders are articulated to a pressure plate which at least partly surrounds the guide rods of a guide-rod assembly on which the skid is guided, a mechanism being provided to advance the skid relative to the guide-rod assembly.

Walking prop for mine tunnels

Growing community of inventors

Gelsenkirchen, Germany

Peter Kroninger