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Cobblestone is a natural building material based on cobble-sized stones, and is used for pavement roads, streets, and buildings. Setts , also called Belgian blocks, are often referred to as "cobbles", [ 1 ] although a sett is distinct from a cobblestone by being quarried and shaped into a regular form, while cobblestones are naturally occurring ...
A cobble (sometimes a cobblestone) is a clast of rock defined on the Udden–Wentworth scale as having a particle size of 64–256 millimeters (2.5–10.1 in), larger than a pebble and smaller than a boulder. Other scales define a cobble's size differently. A rock made predominantly of cobbles is termed a conglomerate.
Blasting mats are used when explosives are detonated in places such as quarries or construction sites. The mats are placed over the blasting area to contain the blast, suppress noise [1] and dust as well as prevent high velocity rock fragments called fly rock (or flyrock) from damaging structures, [2] people or the environment in proximity to the blast site. [3]