OceanaGold Waihi North Project Vibration Performance Assessment Page 40 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 from portal 2. Curtain 120m from portal 3. Truck in decline 4. Insulation 137.1 dBL Decline at 317m from portal 3.2m 400mm 4.2 kg of ANFO 1. Shield at portal 2. Curtain 120m from portal 3. Truck in decline 4. Insulation 153 Pa 137.7 dBL 21 Hz 10 seconds Not all blast trace shown Decline at 314m from portal 3.2m 400mm 4.2 kg of ANFO 1. Shield at portal 2. Curtain 120m from portal 3. Truck in decline 4. Insulation 213 Pa 140.5 dBL 24 Hz 5.7 seconds Remainder of blast around 140 Pa (136.9 dBL) Decline at 311m from portal 3.2m 400mm 4.2 kg of ANFO 1. Shield at portal 2. Curtain 120m from portal 3. Truck in decline 4. Insulation 242 Pa 141.7 dBL 21 Hz 2.4 seconds Cut holes generated around 191Pa at 18 Hz (139.6 dBL) 171Pa at 23Hz generated by holes at 6.9 seconds (138.6 dBL) Decline at 308m from portal 3.2m 400mm 4.2 kg of ANFO 1. Shield at portal 2. Curtain 120m from portal 147 Pa 132.3 dBL 22 Hz 0ms Perimeter holes on #15 delay at 9.3 seconds generated 137Pa at 22Hz (136.7 dBL)
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