Authors: G.D. Buyalich, M.K. Husnutdinov, A.A. Khoreshok, Yu.A. Lagunova, Buialich

Title of the article: The formation of torque on a rolling tool during the formation of wells with angular stress concentrators

Year: 2024, Issue: 5, Pages: 78-85

Branch of knowledge: 2.8.8. Geotechnology, Mining machines (engineering)

Index UDK: 622.24.051.55

DOI: 10.26730/1816-4528-2024-5-78-85

Abstract: One of the main problems in the sections during overburden operations by blasting strong underlying rocks above the mineral formation is to reduce the cost of these operations, which consists in reducing the volume of drilling operations and reducing the amount of explosives, which directly affect the cost of overburden operations. In this direction, the Department of Mining Machines and Complexes of the T. F. Gorbachev Kuzbass State Technical University has been working for several years to improve drilling tools for forming drilling wells for explosives of non-circular cross-section with angular stress concentrators (for example, square section). A distinctive feature of such drilling is that in order to achieve this effect, serial rotary drilling rigs with a specially designed spherical tool with its own geometry and kinematic connections are used. The article gives a comparative assessment of the influence of the shape of the well on the change in torque per revolution of a drilling tool with a different number of cutters. It is determined that with an equal cross-sectional area of the well, the change in torque is influenced by the ratio of the angles of conjugation of the walls of the well and the number of cutters, as well as the degree of rounding of the angles of conjugation of the walls and their convexity. It has been established that in order to reduce the perturbation of torque fluctuations, among the considered combinations of the number of angles of conjugation of the walls of the wells and the number of cutters, a three-cone bit should be used to form a quadrangular cross-sectional shape.

Key words: drilling drilling tool bore-hole shape well blast hole cone bit cutter

Receiving date: 31.10.2024

Approval date: 15.11.2024

Publication date: 11.12.2024

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