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All modern roadheaders utilize the gathering arm loading system and chain conveyor
in the center of the machine. The other loading mechanisms that are in use are spinner
loader and swinging loading beams. These roadheaders are mounted on the crawler
track assembly, tramming at the speed exceeding 15 m/min.5 Roadheaders employed
in rock cutting use conical self-sharpening picks.
This equipment can handle small boulders by breaking them loose from their
matrix and picking them up with the muck. Large boulders are difficult to handle in
two respects (Asche & Cooper, 2002): (i) picks can break when they suddenly strike a
large boulder, and (ii) the muck handling system is usually unable to deal with large
boulders and can get jammed.
Figure 10.1 (c) presents a light duty and small sized roadheader manufactures by
Paurat, Germany;8 the same company also manufactures the large and medium sized
10.2 CLASSIFICATION BOOM MOUNTED ROADHEADERS
Based on the cutting principle employed, the roadheaders, or continuous miners can
be classified3 as listed below:
● Ripper or Transverse type: Bar and Disk
Milling or longit...
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This document was uploaded on 02/12/2014.
- Spring '14