Sandvik DD311 is available in three different versions, including DD311D and DD311DE. It is a medium size, single-boom jumbo designed for fast and accurate drilling within drifting and tunneling of 40 m² sections.
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Sand and gravel are now the most-extracted materials in the world. But the decline of available natural resources and the negative impact of natural sand’ extraction on the environment raised awareness of the need to find other solutions.
Manufactured sand produced by crushed rock is being considered as an appropriate alternative.
When sand and gravel are quarried, there are often impurities such as loam, clay, wood or coal. For this reason, a combination of cleaning and separating processes are implemented at an early stage to gain precious raw materials.
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