Continuous Excavator for Surface Coal Mining.
Kay-FJ; Gordon-J; Crow-LH
Proc Off-highway Vehicle Meeting and Exhib Mecca 1977 :1-12
A forward-rotating bucket wheel excavator designed to continuously fragment and load unshot coal was tested in an open pit mine. In principle, the excavating wheels rotate faster than required for rolling contact with the surface; therefore, the buckets excavate, carry away material, and provide a tractive effort to aid in pulling the vehicle forward. Production rates of 1,080 tons per hour (1,000 cubic yards per hour) were achieved using 510 horsepower verifying projected fragmenting and loading cost savings of 80 percent over conventional methods. Furthermore, because of the uniform small- size of the coal excavated, additional savings in preparation plant costs are possible.
Proc. Off-highway Vehicle Meeting and Exhib., Mecca, 1977, SAE Preprint 770743, 1977, PP. 1-12