OceanaGold Waihi North Project Vibration Performance Assessment Page vi of 41 Project Number: HP2006-2 Heilig & Partners Save Date: 21/06/2022 5:55:00 PM ABN 56 082 976 714 File Name: WAI-985-000-REP-LC-0018_Rev 0 List of Figures Figure 1 – Plan showing the GOP together with other surface and underground works that form part of WNP ........................................................................................................................................................ 1 Figure 2 - Schematic of the final extents of the GOP .............................................................................. 3 Figure 3 - Plan of the WUG Access Decline ........................................................................................... 4 Figure 4 - Plan of the WUG Access Tunnel corridor ............................................................................... 4 Figure 5 - Plan of the WUG Development ............................................................................................... 5 Figure 6 - Human response to vibration from transient and steady state vibration events (Wiss, 1981) 7 Figure 7 - Vibration vs scaled distance based upon previous projects. These data have been used to develop the project specific relationships .............................................................................................. 19 Figure 8 – Preliminary blast designs options for WUG based upon minimising potential vibration impacts to the Archeys Frog population ................................................................................................ 23 Figure 9 – Possible vibration monitoring sites the GOP ........................................................................ 28 Figure 10 – Possible vibration monitoring sites for the plant access tunnel ......................................... 29 Figure 11 – OceanaGold’s web page showing measured vibration levels for each monitoring site ..... 30 Figure 12 – Proposed monitoring locations within underground network ............................................. 31 Figure 13 – Proposed surface assessment locations ........................................................................... 31 List of Tables Table 1 - Transient vibration guide values for cosmetic damage (reproduced from BS7385-2:1993) . 12 Table 2 - Summary of proposed blasting conditions ............................................................................. 16 Table 3 - Source data location to establish relevant vibration relationship for each project ................. 19 Table 4 - Summary of vibration/distance/explosive weight relationships for each project .................... 19 Table 5 - Comparison between predicted and actual vibration results from Waihi projects ................. 20 Table 6 – Preliminary blasting options for WUG ................................................................................... 23
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