Raise boring is used to drill shafts for ventilation, transferring ore from one level to another, creating silos for storing rock as well as hoisting of rock and ore to the surface. The application of Raise boring in mining also assists in providing access for personnel or material underground.
[pdf] You can drill holes in the rock. Many useful things made of stone might require holes or something you can make from rock by drilling holes in it. While you may think this would be pretty challenging, the job be.
[pdf] A down-the-hole drill, usually called DTH Drilling Rig, is basically a mini jackhammer screwed on the bottom of a drill string. The speedy hammer activity breaks hard stone into little flakes and dust and can be dismissed evident by the air exhaust in the DTH hammer.
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