The existence of bucket wheel equipment type ERC 1400-30/7 in lignite quarries with lifetime expired, or in the ultimate life period, together with high cost investments for their replacement, makes rational the efforts made to rehabilitation in order to extend their life. Work on this prototype is continuing on the details of transfer of material from the bucket wheel to an internal conveyor mechanism, which testing demonstrated to be problematic in the current design.īucket wheel rehabilitation of ERC 1400-30/7 high-capacity excavators from lignite quarries This suggests that the excavation rate can be much larger for the same excavation system mass.
At excavation rates in the vicinity of one rover mass of material excavated per hour, tests of the prototype demonstrate that the power required is largely that needed to operate the excavator hardware and not related strongly to the amount of material excavated. The prototype allows the collection of data on forces exerted and power requirements for excavation and will provide data on which more efficient designs can be based. A prototype small bucket wheel excavator has been built at approximately the scale of the rovers that are carried to Mars on the Mars Exploration Rover Mission. It also has the advantage that excavation forces are principally horizontal rather than vertical, which minimizes the need for excavator mass and suits it to operations in reduced gravity fields. The bucket wheel excavator is relatively simple, compared to machines such as front end loaders. A bucket wheel excavator is proposed, which has the capability of continuous excavation, which is readily adapted to granular regolith materials as found on the Moon, in drift deposits on Mars, and probably on the surface of asteroids and satellites, such as Phobos. Typically, concentrations of volatiles are low, so relatively large amounts of material must be excavated. B.Įxcavation of surface regolith material is the first step in processes to extract volatile materials from planetary surface regolith for the production of propellant and life support consumables. Bucket wheel excavators for open-cast mining all over the worldĮnergy Technology Data Exchange (ETDEWEB)Ī report is given on the use of bucket wheel excavators, spreaders and tripper cars in open-cast mining of brown coal, oilsand and other minerals in Australia, Canada, India, Spain, USA and Yugoslavia as well as on the use of bucket wheel excavators for land reclamation in Singapore.Ī Prototype Bucket Wheel Excavator for the Moon, Mars and Phobos
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