Penetration rate of rotary drills

Added: 27.02.2018

Duration: 9:29


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Seven parameters of the rock or rock mass, including uniaxial compressive strength UCS of the rock, Schmidt hammer hardness value, quartz content, fragment size d 80alteration, and joint dip, are included in the model along with two operational parameters of the rotary drill, bit rotational speed and thrust.
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