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Technology and tool for drilling large-diameter ventilation boreholes

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Parent Category: 2026

Category: Content №2 2026

Created on 25 April 2026

Last Updated on 25 April 2026

Published on 30 November -0001

Written by S. P. Minieiev, V. Ye. Antonchyk, A. V. Pazynich, V. F. Hankevych, I. M. Matsiuk

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Authors:

S. P. Minieiev, orcid.org/0000-0002-4594-0915, M. S. Poliakov Institute of Geotechnical Mechanics of the National Academy of Sciences of Ukraine, Dnipro, Ukraine, е-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

V. Ye. Antonchyk*, orcid.org/0000-0002-4161-9112, M. S. Poliakov Institute of Geotechnical Mechanics of the National Academy of Sciences of Ukraine, Dnipro, Ukraine, е-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

A. V. Pazynich, orcid.org/0009-0003-6408-6800, M. S. Poliakov Institute of Geotechnical Mechanics of the National Academy of Sciences of Ukraine, Dnipro, Ukraine, е-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

V. F. Hankevych, orcid.org/0000-0002-8535-6318, M. S. Poliakov Institute of Geotechnical Mechanics of the National Academy of Sciences of Ukraine, Dnipro, Ukraine, е-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

I. M. Matsiuk, orcid.org/0000-0002-0861-0933, Dnipro University of Technology, Dnipro, Ukraine, е-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

* Corresponding author e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

повний текст / full article

Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu. 2026, (2): 039 - 049

https://doi.org/10.33271/nvngu/2026-2/039

Abstract:

Purpose. To develop energy-efficient technology for drilling large-diameter ventilation boreholes from underground workings to the surface and create drilling tools that reduce energy consumption and wear during the destruction of hard rock.

Methodology. The development of a new technology for drilling ventilation boreholes and a drilling tool for drilling large diameter boreholes was carried out on the basis of the TRIZ (Theory of Inventive Problem Solving) and ARIZ (Algorithm for Inventive Problem Solving). The formation of theoretical solutions was carried out by means of physical and mathematical modelling of the stress state of rocks under the action of various types of drilling tools, and the results of calculations were processed in the Mathcad environment.

Findings. The drilling technology involves drilling an initial small-diameter ascending borehole from the working, which serves as a guide. Next, one or two large-diameter boreholes are drilled. Their bottom is formed as a truncated cone, which ensures the gravity movement of the destruction products to the leading borehole and their subsequent entry into the working. The technology includes the creation of two types of leading cuts: central and annular ones in the corner zone. This configuration of the bottom creates favourable conditions for further destruction of the rock. A network of cracks is created on the surface of the face with a percussion tool in the zone between the cuts, after which the fractured rock is effectively removed by the cutting elements of the tool. The created design of the drill bit contains cone bits for forming an annular cut and a bit crown for forming a central one. To destroy the rock in the intermediate zone, a pneumatic hammer with a chisel crown is used, which forms fractures, and a cutting crown to remove the weakened layer.

Originality. The technology is based on technical solutions that define effective drilling principles in difficult geological conditions and increase tool stability in hard rocks. The bit design combines an impact-cutting destruction mechanism and rational energy distribution during the drilling process.

Practical value. The proposed technology and drilling tool allow significantly reducing the duration of drilling operations and their cost. Increasing the penetration rate, reducing energy consumption and tool wear ensure economic efficiency. The technology allows one to quickly drill ventilation boreholes at the necessary points, improve ventilation of mine workings and reduce air transportation costs.

Keywords: rocks, ventilation boreholes, drill bit, mine workings, drilling, drill rods

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