1954 3. RESULTS Laboratory Test Outcomes – Induction Times vs. Inhibitor Content Over the course of the project, dozens of isothermal tests were conducted at different inhibitor levels for each of the samples. Samples were preselected to be the most reactive available and covered diverse geology. Table 44 illustrates the general trend observed, showing that the reaction induction time increases with increasing inhibitor content in the explosive. Table 44: Isothermal Test - Time (hours) to Reaction at 55 oC Treatment Isothermal Sample 1 Isothermal Sample 2 0 units Inhibitor 0 0 1 unit Inhibitor 15 83 2 units inhibitor 188 526 The induction times varied between samples, as expected given the diversity of samples tested, but the trend of increasing induction time with increasing inhibitor was consistent. A dataset of inhibitor level vs time to reaction was accumulated for the most reactive samples tested over a year. Analysis of the dataset showed a consistent function across the samples analyzed. Given the significant difference in reactivity across sites and the potential for reactivity to change through the mining cycle, annual testing against at least 12 carefully selected samples from each site remains a key pillar to confirm products are suitable for the current and expected conditions.
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