Publication: Integration between the site-specific k and β value in blast design optimization at limestone quarry
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Date
2024-08-01
Authors
Nur Dini Binti Mazli
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Abstract
Therefore, this research focuses on determining the improvement in the blast design at Hume Cement Quarry through the consideration of quarry specific K and β values. The sample size was taken as 50 samples per blasting event, so that a large database was created. The actual measurement method consisted of pre-blast tests, measuring PPV with a vibrometer, and point load tests to evaluate the physical characteristics of the rock samples, especially their Is(50). It was observed that Is(50) with site-specific constants were related positively with PPV and trends were clearer in terms of strong rock and low PPV figures. This correlation brings out a view that it is possible to see distinctive geological conditions when designing blasts. This study also revealed that the existing Australian Standard for blasting could not be used for Hume Cement due to the geological contrast of Malaysian and Australian locations, therefore; a separate site’s predictor was needed. Current recommendations include use of these new constants as a way of reducing on the effect the quarry has on the environment and to align parameters of blasting to geological features of the quarry. For this reason, constant check and review are critical in order not to deviate much from the realities on the site. The findings of this research contribute to enhancing knowledge in blast design with an emphasis on the principle of determining appropriate plans according to the geology of the rock mass. The conclusions provide recommendations for the quarrying business, some of which can be deemed specific for enhancing organisational efficacy and sustainability