Development of a Drilling Tool for Making non-Circular Cross-sections of Blastholes at Open-cast Operations

DOI

10.2991/coal-18.2018.38How to use a DOI?

Keywords

rock drilling, kinematic analysis of drilling tools, non-circular shape of a borehole, design of the drilling tool, drilling tool roller

Abstract

In mining minerals by open-cast method, the environment is exposed to a powerful man-made impact, a significant part of which is associated with mass explosions during rock crushing. In preparation of rocks for excavation by blasting, a significant amount of dust and gases is emitted into the atmosphere; therefore, a decrease in the use of explosives is an urgent task both in terms of reducing the cost of blasting operations and from the ecological point of view. This task can be solved by increasing the effectiveness of the explosion. The results of studies of the process of blasting boreholes with a non-circular cross-section confirm the practical need in developing this drilling tool. In using the kinematic method applied in engineering for assigning complex surfaces, the conditions under which it is possible to produce boreholes with a non-circular cross-section are considered. The designs of the drilling tool with variable and fixed linear dimensions are selected which allow formation of a non-circular cross-section of the borehole, their shortcomings have been analyzed. The roller-cutter method for forming a non-circular cross section is substantiated, at which a smaller number of kinematic links of the drilling tool is achieved and a greater number of ways to impact the rock is ensured.

Copyright

© 2018, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Gennady Buyalich
AU  - Viktor Tatsienko
AU  - Mikhail Khusnutdinov
AU  - Polina Podkur
PY  - 2018/10
DA  - 2018/10
TI  - Development of a Drilling Tool for Making non-Circular Cross-sections of Blastholes at Open-cast Operations
BT  - Proceedings of the 9th China-Russia Symposium "Coal in the 21st Century: Mining, Intelligent Equipment and Environment Protection" (COAL 2018)
PB  - Atlantis Press
SP  - 208
EP  - 211
SN  - 2352-5401
UR  - https://doi.org/10.2991/coal-18.2018.38
DO  - 10.2991/coal-18.2018.38
ID  - Buyalich2018/10
ER  -