Darda ROCK SPLITTERS
Main Darda Rock Splitters
Application Reports Index
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| Application Report - Block quarrying in the Natural
Stone Industry |
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Sandstone - hand-driven
wedges fail, splitters succeed
The Job:
At a quarry in Bloeslawiec, Poland, some 500,000
m3 of sandstone are quarried in blocks annually. The rock is stratified,
has a weak crystal structure and can only be split with considerable
care.
The requirements:
No hairline cracks are permitted because the blocks
are used to make facing slabs. This also means that explosives cannot
be used. Formerly, the workers started the quarrying process with
hand-driven wedges. This, however, was both physically demanding and
particularly uneconomical, since the rock could only be poorly split
in this way.
The solution:
The solution to the problem lay in Darda hydraulic
rock and concrete splitters. Before a block is produced, the workers
analyse the structure of the rock, paying attention to the natural
layer and cracks and precisely defining the direction of the split
accordingly. With three splitting cylinders, each splitting process
takes about one minute.
Following this, the split is enlarged with enlarging counter wedges,
thereby overcoming the natural integrity of the sandstone block. Using
this method, two men can produce blocks measuring 2 m x 1.2 m x 1.4
m in a double shift. With hydraulic splitters, block production is
now 80% faster than with hand driven wedges, costs are reduced and
the entire operation is considerably more economical.
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