Energy of rock breaking in percussive drilling

descriptionPublicationkeyboard_double_arrow_right Article , Other literature type 01 Sep 1980 English Publisher:Springer Science and Business Media LLCJournal:Soviet Mining Science, volume 16, pages 440-443 (issn: 0038-5581, eissn: 1573-8736,

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Authors: N. A. Belyaev; N. N. Esin;

doi: 10.1007/bf02499272

Energy of rock breaking in percussive drilling

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Abstract

1. The volumetric rate of widening boreholes with the aid of pneumopercussive reamers is 2.5–4.0 times greater than the volumetric rate of drilling by the series-produced M48, MP-3, and M32K pneumatic drills; this is due both to the higher power of the reamers and to the different rock-fracture conditions (shape of face, geometry of bit, effectiveness of mud removal, etc.). 2. The energy of rock fracture during cutting of boreholes by pneumopercussive reamers is lower than for drilling by pneumatic drills.

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