| 摘要 |
<p>Shaft sinking apparatus 12 including a platform 14 having a number decks 16, known as a sinking stage, a vertically displaceable or extendible boom assembly 18, a gear driven slew gear 20 for attachment and operation of said boom assembly 18, which slew gear permits full 360 degree rotation, an excavator digging arm and bucket assembly 22 mounted at an end region of said boom assembly 18 and which, in use, operates at the bottom zone of the shaft being sunk, one or more skips 24 for receiving material extracted using the digging arm and bucket assembly 22 and displacing same from a working zone 26 of the apparatus, one or more extended fixed guidance systems 28 extending from the working zone of the apparatus at the bottom zone, and a vacuum cleaner apparatus 32 used in conjunction with the telescopic boom assembly 18 and excavator arm and bucket assembly 22 in order to clean and transfer fine material left in the bottom zone of the shaft after loading operations into the skips 24.</p> |
