| 摘要 |
<p>Method and apparatus for enabling movement of a section (18-24) of a mining conveyor in at least two separate modes. In the first movement mode the conveyor section (21, 22) is advanced by a first distance (x) which corresponds to the full stroke of a hydraulic ram associated with the conveyor section and in the second mode the conveyor section (18-20, 22,-24) is advanced by a distance (a-e) less than the first distances (x). In the first movement mode hydraulic pressure to the ram is maintained subsequent to movement of the conveyor section, and in the second mode this pressure is not maintained. The invention includes a computer system for calculating the require movement distances for a number of different conveyor sections, as well as a kit of parts and modified rams for modifying existing systems to enable them to function according to the described method. <IMAGE></p> |
