DEVELOPMENT OF A PICKFORCE STEERING SYSTEM VOLUME 1
The aim of the project was to develop a system of automatic steering for ranging drum shearers based on measurements of the forces imposed on the picks during cutting. The project covers the development of systems for single and double-ended machines, and surface and underground trials to prove their performance and reliability. The original objectives have now been met. Pick force vertical guidance systems are suitable for situations where the natural gamma radiation system cannot be applied, i.e.: - Coalfaces where no roof coal is to be left; - Coalfaces with a sandstone roof which does not emit sufficient natural gamma radiation; - Coalfaces where the roof coal to be left is thicker than 500 mm, which is outside the range of the 801 Natural Radiation Roof Coal Thickness Sensor; - Coalfaces where extraction is greater than 3 m and the use of a roof follower is impractical; - Coalfaces where inconsistent levels of natural gamma radiation are caused by the top coal being banded with shale. The pick force system can also be used on coalfaces where the natural gamma radiation system is currently deployed, having the advantage of no roof follower.
Bibliographic Reference: EUR 12312 EN (1989) VOL. I, 105 PP., MF, ECU 8, BLOW-UP COPY ECU 13.75 AVAILABLE FROM THE OFFICE FOR OFFICIAL PUBLICATIONS OF THE EUROPEAN COMMUNITIES, L-2985 LUXEMBOURG
Availability: Can be ordered online
Record Number: 1989128032900 / Last updated on: 1990-11-09
Available languages: en