Dry drilling in underground production

Abstract A scientific testing program, sponsored by the Mining Industry Research Organization of Canada (MIROC), was undertaken on the surface and underground facilities of Inco's Crean Hill Mine to investigate the effectiveness of using dry drilling with a dust control system.
The surface test work consisted of the monitoring of advance rates and bit life while a series of 165 mm holes, wet and dry, were drilled at both mine air (0.69 MPa) and high pressure air (1.72 MPa). The results, based on statistical evaluations of field data, indicated that penetration rates can be increased by an average of 24% when drilling dry with high air pressure and by approximately 27.5% when drilling dry with mine air as compared with wet drilling under the same conditions. Dry drilling also has the effect of reducing button wear by approximately 69% using high pressure air. The underground test work employed a dust collection system developed for use with large diameter holes (165 mm) and high pressure drilling. The testing program has indicated that an average increase in penetration rate of 35% can be achieved when dry drilling in rock (waste) and of 49% when dry drilling in ore with high air pressure. Although preliminary dust monitoring did not indicate any appreciable increase in dust concentration during dry drilling, further dust monitoring is still required.
A comparative cost analysis has indicated the potential for reduction in drilling costs when dry drilling is utilized. Further testwork is to be conducted to develop a reliable dust collection system for underground production.
Keywords: Dry drilling, Drilling, Underground mining, Dust control.
Full Access to Technical Paper
PDF version for $20.00
Search
Sort By:  Relevance
Showing results 1 - 5
Text
Publication: CIM Bulletin
Author(s): Lynne Bowen
Issue: 963
Volume: 85
Year: 1992
Text
Publication: CIM Bulletin
Author(s): Andrew Cormier
Issue: 963
Volume: 85
Year: 1992
Text
Summary: At Teck-Corona Operating Corporation's David Bell Mine, a successful -water quality management strategy has been established. This resulted from the development and application of process technology, allowing year round discharge of an effluent exceeding the chemical and biological standards set by the Ministry of Environment. This strategy aims at minimizing contaminant levels of effluents through optimization of reagent selection and reduction of effluent volumes through maximizing reclaim...
Publication: CIM Bulletin
Author(s): Klaus Meyer
Keywords: Water quality, Effluent treatment.
Issue: 963
Volume: 85
Year: 1992
Text
Summary: This paper is a brief overview of the role of oxygen in cyanide leaching of gold feeds (e.g. ore, concentrate). As the majority of gold occurs in the elemental state (Au°), its oxidation is of vital importance for dissolution in the cyanide lixiviant. The cyanida-tion at high pH is favourable for the oxidation of Au° with a mild oxidant such as air or oxygen. Beside oxidation of gold, deleterious effects of soluble sulphides, arsenates, antimonates on cyanidation of gold can be...
Publication: CIM Bulletin
Author(s): K.E. Haque
Keywords: Gold, Cyanide leaching, Chemistry of cyanidation, Oxidation, Preaeration, Active oxygen.
Issue: 963
Volume: 85
Year: 1992
Text
Summary: Australia's prosperity relies significantly on income generated from exports of resources and agricultural products. In 1989-1990, coal was Australia's most valuable export commodity, contributing A$5.7 billion or 14% of all export income.
The abundance and quality of its coal resources and the proximity of Australia to the rapidly developing economies of Southeast Asia were significant factors that encouraged export-oriented growth and investment and will continue to do so. On the other...
Publication: CIM Bulletin
Author(s): Trevor McGiddy
Keywords: Coal industry, Australian coal industry.
Issue: 963
Volume: 85
Year: 1992
Powered by Coveo Enterprise Search