Fiery Mines Blasting Certificate Exam Practice Questions - Fiery Mines Blasting Certificate Of Competency Examination (South Africa) Exam

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Under South African Mine Health and Safety Act (MHSA) regulations, why are only 'Permitted Explosives' authorized for shotfiring in underground coal mines classified as fiery?

Permitted explosives produce a lower flame temperature and shorter flame duration, minimizing the risk of igniting methane or coal dust clouds Permitted explosives are water-soluble so they dissolve immediately if exposed to mine drainage water Permitted explosives generate higher detonation pressure to shatter heavy roof shale without producing shockwaves Permitted explosives contain aluminum powder to increase heat output and speed up rock breaking

Correct Answer:

Permitted explosives produce a lower flame temperature and shorter flame duration, minimizing the risk of igniting methane or coal dust clouds

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