RESULTS
Table 1 - Results for Testing using the AEISG Code of Practice
Table 2 - Results for Testing using the QMR Reactive Ground Test
Prior to testing as per the AEISG Code of Practice each sample was assessed for reactivity risk based on pH, carbonate and amount of reactive sulphide using the QMR Reactive Ground Test (refer to Table 1 and Table 2 for results of both tests). All samples were alkaline and which reduces the risk of reactivity. All samples contained sulpide levels of trace (refer to Table 2 and Figures 1 to 6). All samples contained carbonates or coal which inhibites a reaction between nitrates and sulphide. For AEISG testing, only sample 13 gave a temperature isotherm of 0.8°C which is classified as not reactive as per the AEISG Code of Practice.
Figure 1 – Pyrite observed under microscopy in the milled samples S1(left) and S2(right)
Figure 2– Pyrite observed under microscopy in the milled samples S3(left) and S4(right)
Figure 3- Pyrite observed under microscopy in the milled samples S5(left) and S6(right)
Figure 4 - Pyrite observed under microscopy in the milled samples S7(left) and S8(right)
Figure 5 - Pyrite observed under microscopy in the milled samples S9(left) and S10(right)
Figure 6 - Pyrite observed under microscopy in the milled samples S12(left) and S13(right)
Conclusion:
No samples were found to be reactive when tested as per the AEISG Code of Practice.
Reference Data:
QMR Reactive Ground Test: rga32.xlsx, templog29.xlxs and templog30.xlxs
AEISG Test: data26.xlxs
Assessed By:
Dr G. Cavanough
Date:
26th September 2022