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The hardness of limestone can vary greatly, from relatively soft to extremely hard, depending on factors such as its mineral content and degree of compaction. Soft limestones can be easily drilled using standard drilling equipment, but harder varieties often necessitate more robust machinery and specialized bits. Carbide-tipped drill bits, for instance, are commonly employed due to their durability and ability to withstand the abrasive nature of limestone.

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At the heart of coal mining operations lie the pickaxe and shovel, traditional tools that have been used since the dawn of mining. The pickaxe, with its sharp blade, is used to break and remove rock and coal, while the shovel aids in scooping the loosened material into carts or conveyors for transportation. Despite the advent of modern technology, these rudimentary tools remain essential in certain mining methods, particularly in smaller or more accessible mines.

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The term 'rotary' in the name refers to the unique mechanism that sets it apart from other drilling tools. Unlike traditional drills, a rotary jackhammer employs a combination of rotation and hammering action, making it highly effective in breaking through hard materials like concrete, rock, and masonry. Its operational principle is based on a reciprocating piston, which generates a series of rapid blows, driving a chisel into the surface with immense force.

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