Blast optimization at Kriel Colliery

Show simple item record Neale, A.M. 2010-09-22T09:15:11Z 2010-09-22T09:15:11Z 2010-04
dc.description.abstract Kriel Colliery has experienced some sub-standard blast results on the overburden. Blast results are considered poor when the fragmentation is too big, back break into the new highwall, capping is experienced and/or excess overburden material is thrown into the void. Poor blasting leads to lower productivity, equipment breakdowns, and poor drilling and blasting results on the adjacent blast, contamination of coal or loss of coal. A simulation was developed in Microsoft Excel to model blasting results while changing various parameters. From the simulation results, it could be seen that a change of blast design could be beneficial. As an example, smaller drilling patterns were simulated (10 m x 10 m to 8 m x 8 m, and 8 m x 8 m to 7 m x 7 m in Pit 5 and Pit 6 respectively) in combination with changes in explosives (P700 emulsion vs. ANFO) and drill bit diameter (311mm vs. 251mm). The results show that each of the options has a specific scenario that will be most beneficial to the mine. These results are quite specific and subject to variable inputs. The purpose of the example is to demonstrate how the simulation can be used as a tool to assess blast design variations. en_US
dc.identifier.citation Neale, AM 2010, 'Blast optimization at Kriel Colliery', Journal of the South African Institute of Mining and Metallurgy, vol. 110, no. 4, pp. 161-168. [] en_US
dc.identifier.issn 0038-223X
dc.language.iso en en_US
dc.publisher Southern African Institute of Mining and Metallurgy en_US
dc.rights © The Southern African Institute of Mining and Metallurgy en_US
dc.subject Blast optimization en_US
dc.subject.lcsh Coal mines and mining -- South Africa en
dc.subject.lcsh Blasting -- South Africa en
dc.title Blast optimization at Kriel Colliery en_US
dc.type Article en_US

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