Abstract
Contemporary approaches and techniques impacting subsurface penetration performance and penetration rate are studied and analyzed. Two main dimensions are identified, and the works performed during operation were compared. A solution based on implementation of modular architecture of the system with optional connection of modules, performing computations according to various techniques, enabling comparison of calculation results and selection of the most effective option, is proposed. A computational experiment based on real-objects data was conducted. The factors effecting drilling-and-blasting operations were identified during its course. A model designing the optical projections over targeted drill holes is also obtained. The proposed approach is more effective and accurate than manual application of drill hole spacing by paint; in addition, is saves a lot of time required for setting-up. Another highlighted advantage of the developed approach is high quality and accuracy at marking of the drill hole spacing for blasting pattern in accordance with geometrical features of the surfaces, vs. approaches and techniques used at preparation to drilling earlier. Aside from that, a clear trend of consistent improvement and perfection by means of application of intelligent algorithm is observed in this scope.
Highlights
Today, most of the mining companies conducting subsurface mining operations use drillingand-blasting for construction of level and incline working
Two dimensions effecting penetration performance and penetration rate most significantly can be identified: first, this is accuracy and conformity to the actual specifics of generated blasting pattern, and secondly, human factor at spacing and blasthole drilling. The latter can be mitigated by using robotized drilling units capable of accomplishing the above operations without human participation (e.g., Sandvik DD422IE or Atlas Copco Boomer), the cost of such units is quite high, and their application is not always expedient
To eliminate the human factor from procedures of generation and plotting of the drillhole spacing at actual site, the authors are developing a software-hardware system of automatic hole drilling with an option of automatic calculation and mapping drillhole spacing
Summary
Most of the mining companies conducting subsurface mining operations use drillingand-blasting for construction of level and incline working. Penetration performance significantly depends on accuracy of blasting pattern calculation and accuracy of spacing, drilling and planting of explosives, eventually. Quality of blasting subsequently effects further process stages, as well. A company can suffer major economic losses as a result of poor quality of drillingand-blasting operations
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