Code of Practice - Orica Mining Services

1 australian explosives industry and safety group Inc. code of Practice PREVENTION AND MANAGEMENT OF BLAST GENERATED NOx GASES IN SURFACE BLASTING Edition 1 June 2011 code OF GOOD Practice PREVENTION AND MANAGEMENT OF BLAST GENERATED NOx GASES IN SURFACE BLASTING Edition 1 June 2011 australian explosives industry and safety group Inc. A u s t r a Edition 1 June 2011 code of Good Practice : Prevention and Management of Blast Generated NOx Gases in Surface Blasting ABOUT THE AEISGThe Australianoriginally knowncomprised ofLimited), Orica previously ERT) and Total Energy Systems (TES). Since formation,includes: Applied explosives Technology Pty Ltd Thales Australia Dyno Nobel Asia Paci Maxam explosives (Australia) Pty Ltd Orica Australia Limited Roche Blasting Services Pty Ltd Johnex explosives The goal of manufacture,blasting throughout Australia.

2 Copyright AEISG Inc. 20 This document is subject to copyright. No parts of it should be reproduced without the written consent of AEISG Inc. Disclaimer AEISG Inc code and believesaccuracy, completenesscannot anticipate user shouldcircumstancesany loss, expense,information all warranties,contained in this code . l i a n E x p l o s i v e s I n d u s t r y a n d SCode of Good Practice : Prevention and Management of Blast Generated NOx Gases in Surface BlastingABOUT THE AEISG australian explosives industry and safety group (AEISG Inc)known as the australian explosives Manufacturers Safetyof representatives from Dyno Nobel Asia Pacific Ltd (previouslyOrica explosives (previously ICI explosives ), Union previously ERT) and Total Energy Systems (TES).

3 Formation, the AEISG Inc membership has expanded and explosives Technology Pty Ltd Thales Australia Dyno Nobel Asia Pacific Limited Maxam explosives (Australia) Pty Ltd Orica Australia Limited Roche Blasting Services Pty Ltd Johnex explosives the AEISG is to continuously improve the level of safetymanufacture, transport, storage, handling and use of, precursors blasting throughout Australia. Copyright AEISG Inc. 2011 document is subject to copyright. No parts of it should be reproduced without the written consent of AEISG Inc. Disclaimer has taken reasonable care in the preparation of the believes it to be accurate. However, AEISG Inc does completeness or currency of the information containedanticipate or control the conditions under which this information should review the information in the specific context of the intendedcircumstances will AEISG Inc or any of its members be responsibleexpense, cost or damage of any nature resulting from the contained in this code .

4 To the fullest extent permittedwarranties, whether express, implied, statutory or otherwise, contained in this code . S a f e t y G r o u p I n c . code of Good Practice : Prevention and Management of Blast Generated NOx Gases in Surface Blasting Page 1 Inc) was formed in 1994. It was safety Committee and was initially (previously Dyno Wesfarmers Union explosives Espa ol (UEE, broadened. Current membership safety throughout our industry in the and explosives in commercial document is subject to copyright. No parts of it should be reproduced without the information contained in this not guarantee or warrant the contained in this code . As AEISG Inc information may be used, each intended application.)

5 Under no responsible for, or accept liability for, the use of or reliance upon the permitted by law, AEISG Inc disclaims in relation to the information A u s t r a Edition 1 June 2011 code of Good Practice : Prevention and Management of Blast Generated NOx Gases in Surface Blasting PREAMBLE The use of explosives to break rock is an intrinsically harzardousbeen studied over the years and modern Mining methods have risks of blasting under most conditions. These guidelines have been developed to assist the safe use of explosives in situations wherspecific additional hazard may arise due to the generation of nitrogen oxides (NOx) within the post-blast gases.

6 These oxides are generally regarded as products arising from imperfect decomposition of ammonium nitrate explosives during detonation. The purpose of these guidelines is to inform explosives users of:- the hazards of NOx gases;- the likely causes of their generation from blasting;- possible measures to eliminate or minimize NOx generation; and- to The information is provided in good faith and without warranty. l i a n E x p l o s i v e s I n d u s t r y a n d SCode of Good Practice : Prevention and Management of Blast Generated NOx Gases in Surface BlastingPREAMBLE The use of explosives to break rock is an intrinsically harzardous process. These hazards have been studied over the years and modern Mining methods have evolved to minimize the inherent risks of blasting under most conditions.

7 These guidelines have been developed to assist the safe use of explosives in situations wherspecific additional hazard may arise due to the generation of nitrogen oxides (NOx) within the blast gases. These oxides are generally regarded as products arising from imperfect decomposition of ammonium nitrate explosives during purpose of these guidelines is to inform explosives users of: he hazards of NOx gases; he likely causes of their generation from blasting; ossible measures to eliminate or minimize NOx generation; and provide general management advice in the event of NOx information is provided in good faith and without warranty. S a f e t y G r o u p I n c . code of Good Practice : Prevention and Management of Blast Generated NOx Gases in Surface Blasting Page 2 process.

8 These hazards have evolved to minimize the inherent These guidelines have been developed to assist the safe use of explosives in situations where a specific additional hazard may arise due to the generation of nitrogen oxides (NOx) within the blast gases. These oxides are generally regarded as products arising from imperfect decomposition of ammonium nitrate explosives during detonation. ossible measures to eliminate or minimize NOx generation; and provide general management advice in the event of NOx incidents. A u s t r a Edition 1 June 2011 code of Good Practice : Prevention and Management of Blast Generated NOx Gases in Surface Blasting CONTENTS 1. SCOPE.

9 2. DEFINITIONS3. BACKGROUND4. CAUSES OF NOX FUME IN BLASTING5. NOX FUME CAUSES AND MITIGATION MEASURES6. FAULT TREE ANALYSIS OF BLAST GENERATED NOX GASES INCIDENTS7. APPENDIX 1 - FACTORS TO BE CONSIDERED FOR INCLUSION IN REPORT OF POSTBLAST NOX GAS EVENTAPPENDIX 2 - VISUAL NOX FUME RATING SCALEAPPENDIX 3 - FIELD COLOUR 4 - INFORMATION FOR TREATING MEDICAL 5 - TOXICOLOGY OF NOxAPPENDIX 6 - EXPOSURE STANDARDSAPPENDIX 7 - REGULATORY REQUIREMENTSAPPENDIX 8 - REFERENCES l i a n E x p l o s i v e s I n d u s t r y a n d SCode of Good Practice : Prevention and Management of Blast Generated NOx Gases in Surface BlastingONTENTS.

10 DEFINITIONS ..BACKGROUND ..CAUSES OF NOX FUME IN BLASTING ..NOX FUME CAUSES AND MITIGATION MEASURES ..FAULT TREE ANALYSIS OF BLAST GENERATED NOX GASES INCIDENTSMANAGEMENT .. explosives /Precursor Manufacturer/Supplier Risk Assessment Initial Post Loading/Pre Firing Reassessment Risk Management Training Post-blast Fume Identification, Reporting and Recording. Blast Management Plan Investigation of Post-blast NOx Events Weather Conditions Exclusion Zones Management Zones Communication Emergency Response FACTORS TO BE CONSIDERED FOR INCLUSION IN REPORT OF POSTBLAST NOX GAS EVENT ..VISUAL NOX FUME RATING SCALE ..FIELD COLOUR CHART..INFORMATION FOR TREATING MEDICAL OF NOx.