OHS Code Explanation Guide

Published Date: July 01, 2009
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Part 36 Mining

Section 668 Series connection

This section requires the rounds in an underground coal mine blast to be connected in series. By using a series of tie-ins, vibration and other explosion effects are minimized. This reduces the potential damage to surrounding roof and rib formation, thus minimizing the potential for worker injury. This is not an issue in a shaft sinking (typically vertical) where all workers are removed from the shaft prior to the blast. In this specific application of blasting during shaft sinking, there is no hazard to workers so blasting during shaft sinking is exempt from this requirement.

Due to the nature of series blasting, material at the first hole to initiate has time to move, thus relieving the burden on the next hole in the series.