Waihi Surface Explosives Principal Management Plan Approved by: General Manager Approval Date: 15/10/2017 Next Review: Archived OceanaGold Waihi Doc ID: WAI-350-PLN-003 Page 3 of 31 Table of Contents 1. INTRODUCTION....................................................................................................................... 5 1.1 PURPOSE AND SCOPE .......................................................................................................... 5 1.2 LEGAL REQUIREMENTS ........................................................................................................ 5 2. SAFETY MANAGEMENT SYSTEM ......................................................................................... 5 2.1 HSEC MANAGEMENT SYSTEM .............................................................................................. 5 2.2 HIERARCHY OF CONTROLS ................................................................................................... 6 2.3 RISK ASSESSMENT PROCESS ............................................................................................... 7 2.3.1 Training and Competency ........................................................................................... 7 2.3.2 Hazard Identification ................................................................................................... 7 2.3.3 Risk Management Process ......................................................................................... 8 2.3.4 Preventative and Corrective Actions ........................................................................... 8 2.4 COMMUNICATION ................................................................................................................. 9 3. HAZARD IDENTIFICATION.................................................................................................... 10 4. ROLES AND RESPONSIBILITIES ......................................................................................... 11 4.1 SITE SENIOR EXECUTIVE .................................................................................................... 11 4.2 MINE MANAGER / SITE SERVICES MANAGER ....................................................................... 11 4.3 DRILL AND BLAST SUPERVISOR .......................................................................................... 11 4.4 MAGAZINE KEEPER ............................................................................................................ 11 4.5 APPROVED HANDLERS ....................................................................................................... 11 4.6 BLAST CONTROLLER .......................................................................................................... 12 4.7 BLAST GUARD .................................................................................................................... 12 4.8 HSEC MANAGER ............................................................................................................... 12 4.9 EMPLOYEES ....................................................................................................................... 12 4.10 COMPETENCY AND TRAINING .............................................................................................. 12 5. EXPLOSIVES DELIVERY AND STORAGE ........................................................................... 12 5.1 EXPLOSIVES USED ON SITE ................................................................................................ 12 5.2 DELIVERY AND RECEIPTING OF EXPLOSIVE ......................................................................... 13 5.3 ACCESS, SECURITY AND CAPACITY OF MAGAZINES ............................................................. 13 5.4 MAGAZINE RULES .............................................................................................................. 13 5.5 DAMAGED OR DETERIORATED EXPLOSIVES ......................................................................... 15 5.6 INSPECTIONS AND STOCKTAKE ........................................................................................... 15 6. EXPLOSIVES USE ................................................................................................................. 16 6.1 BLAST SITE PREPARATION ................................................................................................. 16 6.2 BLAST PLANS ..................................................................................................................... 16 6.3 TRANSPORT TO CHARGING SITE ......................................................................................... 16 6.4 CHARGING OPERATIONS .................................................................................................... 16 6.4.1 Standard Holes ......................................................................................................... 16 6.4.2 Non-Standard Holes.................................................................................................. 17 6.4.3 Redrills Whilst Loading.............................................................................................. 17 6.5 FIRING ............................................................................................................................... 17 6.5.1 Blast Exclusion Zones............................................................................................... 17 6.5.2 Fly Rock Management .............................................................................................. 18 6.5.3 Firing Procedure........................................................................................................ 18 6.6 CANCELLED AND SLEEPING BLASTS .................................................................................... 18 6.7 OTHER EXPLOSIVES USE ................................................................................................... 19 6.8 ATMOSPHERIC ELECTRICAL ACTIVITY ................................................................................. 19 6.9 MISFIRES ........................................................................................................................... 19 7. CHARGING EQUIPMENT AND MAINTENANCE .................................................................. 20 7.1 EQUIPMENT ....................................................................................................................... 20 7.1.1 Charging and Transport ............................................................................................ 20 7.1.2 Firing ......................................................................................................................... 20 7.2 MAINTENANCE ................................................................................................................... 20 7.2.1 Special Precautions .................................................................................................. 20 7.2.2 Equipment ................................................................................................................. 20 7.2.3 Preventative Maintenance......................................................................................... 20
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