Gagarin Saratov State Technical University, Saratov, Russia:

I. G. Martyuchenko, Professor, Doctor of Engineering Sciences
M. I. Zenin, Assistant, Zenin-1995@mail.ru
A. Yu. Kolesnikov, Associate Professor, Candidate of Engineering Sciences
S. V. Ivanov, Associate Professor, Candidate of Engineering Sciences

The importance and immediacy of mineral exploration and extraction in the Arctic zone using drilling tools are highlighted. The problems connected with frozen ground exploration with drilling tools are discussed. Hardness and abrasivity of frozen ground lead to fast wear of drilling tools. The further research objective is identified. The current methods of mining are reviewed, and the open pit method is selected for the case study. The existing drilling tools in mineral exploration and mining are examined. Their advantages and disadvantages are listed, and the mechanism and type of deformation in frozen ground in interaction with different drilling tools are discussed. The specificity of each drilling tool is taken into account to find the least energy-intensive and more universal tool both for frozen and thawed rocks. It is required to design a drilling tool which consumes less energy and operates safely for the structure of solid minerals. New promising design solutions are found, and improvability of traditional tools is assessed. The design and mode of the proposed tool are discussed more comprehensively, including the rock–breaking tool interaction and the resultant mechanism of rock fracture. The relation is driven for the resultant force applied to ground in operation of the drilling tool. The resultant force is correlated with the geometry of a screw drill. It is found that screw drilling is implemented through tearing and shearing in soil. Such deformation mechanisms are less energy-consuming, and the fracture mechanism is thus more efficient.

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