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  • Trends of scientific-technical progress in planning and construction of underground structures
    ...not less than 6 m; loading- loaders with 2-3 4n 3 buckets and loading machines with two buckets ; transporting- 10-2g-ton... ...roof, applying gunite, and shoring work, and an arrangement... ...blasting work; and concreting- hydraulic pumps with adjustable output, movable...
  • Placer mining
    Hydraulic dredges are similar to bucketline dredges in that a digging boom is suspended from a floating barge and material is discharged on shore . The principal difference is that, instead of buckets , the excavation is done with a suction pump .
  • Prospects of using grab dredges for excavating gravel-pebble deposits
    Equipping dredges with vibrating or hydraulic scarifiers with grates makes it possible to expand the area of... ...USSR Ministry of Power and Electrification (Minenergo) has favorable experience in using powerful bucket -ladder dredges with... Thus, the construction of the Inguri hydroelectric station was pro- vided with material by a dredge with delivery of gravel to the shore by a floating belt con- veyor and sand by a sand pump .
  • Remedial investigation/feasibility study for the Clinch River/Poplar Creek operable unit. Volume 5. Appendixes G, H, I, J
    Types of mechanical dredges include: bucket wheel dredges, clamshell dredges, and closed- bucket clamshell dredges. Hydraulic dredges pump sediment in a slurry formed by suctioning the sediment. Slurry is typically transported across floating or pontoon-supported pipelines to shore .
  • Offshore Sand and Gravel Mining
    ...production drops off rapidly below that and then a jet lif~ or centrifugal pump with jet assis... clam-shell because that system is ecnomic for their numerous, close-to- shore deposits (Figures 3... Most of the clamshell vessels are equipped with two systems of buckets , each having a capacity of... Many Japanese mining vessels are equipped with one clamshell and one hydraulic dredge system (Figure 6).
  • RDC/EL SR-00-3
    Placement and compaction of all dike material will be accomplished by one CAT D-8 tractor and one CAT 350L (long reach) hydraulic excavator fitted with a bucket and thumb. Site preparation includes the effort to mobilize and station a barge-mounted slurry pump unloader system (see Scenario 2) and deploy approximately 600 feet of 12- inch-diameter neoprene discharge pipeline (450 feet floating, 150 feet shore ).
  • RDC/CHL 08-12
    A large variety of mechanical and hydraulic attachments have been developed to increase production rates of these... These attachments include augers, disks, cutterheads, chain cutters, bucket wheels, wide horizontal cutters, twin rotating vertical cut- ters, and jet pumps . manual operation, some portable dredges can be remotely con- trolled from a shore station, or even...
  • Technology for mining cobalt rich manganese crusts from seamounts
    ...and achieve 90% recovery of crust and substratewhile performingseparation on t h e ship or at shore . The l i f t system could be either hydraulic or mechanical (e.g. continuous line buckets ). mining scenario would consist of a hydraulic l i f t pump - either an air- l i...
  • An investigation into the development of a marine and coastal mining strategy framework for South Africa being brought either to surface for processing on ships or be shipped to shore for processing. a) Hydraulic system (Morgan, et al, 1999) as illustrated in Figure 2.7 was designed in the... ...deposit are screened and processed by the miner on the seabed before being pumped to the mining... b) Continuous Line Bucket (CLB) system (Morgan et al., 1999) is illustrated in Figure 2.8.