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

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In underground narrow-vein stoping, what is the primary operational mechanism of a chemical gassing agent added to a bulk emulsion matrix during charging?

It acts as a primary explosive fuel to increase detonating velocity It generates micro-gas bubbles that sensitize the matrix to detonation by shock wave compression It retards the detonation speed to allow better rock heave in friable ground It neutralizes toxic nitrogen dioxide fumes produced upon detonation

Correct Answer:

It generates micro-gas bubbles that sensitize the matrix to detonation by shock wave compression

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