Ausbausteuerungen fur wechselnde Bedingungen im StrebFunded under: ECSC-COALRES 3C
In Germany and Europe, face-support operations consist of far more than 90% of shield-type mining activities, a procedure which is constantly being modified to meet the varying conditions encountered in long-face mining. A particularly important aspect of this activity is the automation of shield-protected excavation procedures using electro-hydraulic controls to increase production, reduce operating hazards and achieve better conditions for the operators. Such automation is dependent upon the availability of suitable dedicated hardware and software. In 1991 21 long-wall faces were equipped with an electro-hydraulic control system and while some operating functions were immediately successful, the overall results were mixed because of, e.g. varying hydraulic pressure, variable seams and changes in the inclination of the strata. Software which provided for automatic adjustment to variations of local circumstances was later tested on a simulated above-ground installation. Although these test were encouraging - e.g. a 15-20% reduction in re-positioning time, earlier recognition of faults in the hydraulic system and improved preventative maintenance, it was not possible to investigate the system underground because of insufficient funds. However, some manufacturers of control systems are now making provision for semi- or full automatic control of excavation extensions.
Bibliographic Reference: EUR 17956 DE (1998) 52pp.
Availability: Available from OOPEC Sales agents
ISBN: ISBN 92-828-4616-4
Record Number: 199910856 / Last updated on: 1999-06-18
Original language: de
Available languages: de