Abstract
Substantiation is provided for a method of forming boreholes in which part of the soil is removed from the borehole and part is displaced into the mass. Interaction between the pneumatic puncher and the soil is examined, when the pneumatic puncher is used with an impact device having an annular instrument. Calculated relations are obtained to determine the rate of driving of the borehole.
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Petreyev, A.M., Smolyanitsky, B.N. & Danilov, B.B. Borehole Driving with Pneumatic Punchers and Impact Devices Having an Annular Instrument. Journal of Mining Science 36, 567–571 (2000). https://doi.org/10.1023/A:1016637531825
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DOI: https://doi.org/10.1023/A:1016637531825