Development of a Drilling Tool for Making non-Circular Cross-sections of Blastholes at Open-cast Operations
- 10.2991/coal-18.2018.38How to use a DOI?
- rock drilling, kinematic analysis of drilling tools, non-circular shape of a borehole, design of the drilling tool, drilling tool roller
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.
- © 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/).
Cite this article
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 -