Mine Ventilation: Prepare for the MOL Blitz · Auxiliary Mine Ventilation Manual The objective of auxiliary ventilation in underground mines is to deliver sufficient air quantity

Mine Ventilation: Prepare for the MOL BlitzWebinar September 23 10:30 – 11:30 a.m.

Ventilation Blitz

Presenters• Jim Cluff, ‐Moderator, Workplace Safety North (WSN)

• Harsim Kalsi, ‐Mining Engineer, Ministry of Labour (MOL)

• Philip Dirige Ventilation Specialist WSN• Philip Dirige ‐ Ventilation Specialist, WSN

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Ventilation blitz

Agenda

10:30 ‐ 10:40 Introduction

10:40 11:00 MOL presentation

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10:40 ‐ 11:00 MOL presentation

11:00 ‐ 11:15 WSN presentation

11:15 ‐ 11:30 Questions11:15 11:30 Questions

On the bottom right side of your screen there is a place to write a question. At any time during the webinar you can send a question. We will address all questions at the end.

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Ventilation Blitz

Priority Areas

• Mechanical Ventilation SystemsyEmployers must provide and maintain a mechanical ventilation system that will provide a partial pressure of oxygen of more than 18 kilopascals to dilute and remove contaminants from underground workplaces (Subsection 253(1) of Reg 854)underground workplaces. (Subsection 253(1) of Reg. 854).

• Ventilation Systems PlansAccurate plans and records of maintenance for the mechanical ventilation systems must be available at the mine site (Subsectionventilation systems must be available at the mine site. (Subsection 253 (2) of Reg. 854).

• Diesel equipment Equipment used for underground transportation of workers andEquipment used for underground transportation of workers and materials and blasting of rock must be maintained as prescribed. (Subsection183.2(1)2 of Reg. 854)

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Ventilation Blitz

Priority Areas (continued)• Diesel Operating Proceduresp g

Employers must maintain a chart of procedures for the use and operation of diesel‐powered equipment that sets out the actual air volumes and total volume requirements for the equipment in the q q pareas of operations within the mine (Section183 of Reg. 854).

• Air Testing RequirementsEmployers must conduct weekly air volume tests of haulagewaysEmployers must conduct weekly air volume tests of haulagewaysand workings where diesel powered equipment is operating. (Subsection183.2(1)1 of Reg. 854).

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Ventilation Blitz

Priority Areas (continued)• Air Volume Requirements

Employers must ensure that a flow of air provided by a mechanicalEmployers must ensure that a flow of air provided by a mechanical ventilation system: – Be at least 0.06 cubic meters per second for each kilowatt of power

of diesel‐powered equipment operating underground in the p q p p g gworkplace. (Subsection 183.1(3) of Reg. 854).

– Reduce the concentration of toxic substances in diesel exhaust emissions to prevent exposure of a worker to a level of no more th th t ti li it ib d d ti 4 fthan the concentration limits prescribed under section 4 of Regulation 833 (“Control of exposure to Biological or chemical Agents"). (Subsection183.1(4)(a) of Reg. 854).

– Reduce the time–weighted average exposure of a worker toReduce the time weighted average exposure of a worker to airborne respirable combustible dust to not more than 1.5 milligrams per cubic meter of air. (Subsection 183.1(5) of Reg. 854).

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Ventilation Blitz

Priority Areas (continued)• Dust Control

Mechanical ventilation systems must be provided and used to dilute and remove contaminants from the underground environment to prevent exposure of a worker as prescribed. (Subsection 253(1) (b) of Reg. 854)

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Auxiliary Mine Ventilation Manual version 1.3

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Auxiliary Mine Ventilation Manual

The objective of auxiliary ventilation in underground mines is to deliverunderground mines is to deliver sufficient air quantity and quality to all workplaces through the use of combination of fans, ducts and air flow controls.

The manual is intended to provide an overview of auxiliary ventilation andoverview of auxiliary ventilation and to present guidelines for the design, and effective operation and management of auxiliary ventilation systems. It is restricted mainly to underground hard rock operations.

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ContentChapter 1 Introduction 1 pChapter 2 Mine ventilation principles 3Chapter 3 Methods of auxiliary ventilation 9Chapter 4 Auxiliary ventilation fans 29Chapter 5 Auxiliary fan location and operation 41Chapter 6 Auxiliary ventilation ducts 49Chapter 7 Devices for controlling air flow 67Chapter 8 Air volume and fan requirements 71Chapter 9 Practical design and operational requirements 77 Chapter 10 Auxiliary ventilation design 81Chapter 11 Surveys for verification of system compliance 91Chapter 12 Management and operation of auxiliary ventilation systems 103Chapter 13 Ventilation plans and emergency preparedness 109

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References 113Appendix A Glossary 115A di B O t i l ti t i i t i til ti 123Appendix B Ontario regulations pertaining to mine ventilation 123Appendix C Health and safety considerations 133Appendix D Airflow fundamentals 137Appendix E Fan characteristic curves 147Appendix E Fan characteristic curves 147Appendix F Suggested auxiliary mine ventilation survey forms 157Appendix G Conversion factors 163

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Methods of auxiliary ventilation (Chapter 3)

Forcing, blowing or push system

E h ti ti Exhausting or suction system

Force‐duct with exhaust and exhaust overlap system

Long development Long development headings

Plenum method

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Ventilation at specific locations


Auxiliary ventilation fans (Chapter 4)Inlet bell ( p )

Attachments to auxiliary fans and duct systemsS

fan adopter

and duct systems.Screen silencers

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Auxiliary fan location and operation (Chapter 5)operation (Chapter 5)

Air recirculation. Fans in series and in parallel Fans in series and in parallel.

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Auxiliary ventilation ducts (Chapter 6)ducts (Chapter 6)

Flexible, spiral type and rigid ductsducts.

Duct resistance. Distance from face. Duct installation and

maintenance.

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Design factors “rules of thumb” for preliminary ventilation design calculations.

Air requirements for typicalAir requirements for typical diesel equipment.

Diesel control board.

Things to consider for:g practical design, installation, and

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operation of an auxiliary mine ventilation system.


Steps to follow for designing an auxiliary mine ventilationan auxiliary mine ventilation system.

Example design calculations. Fan curve.

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Implementation of auxiliary p yventilation management program such: V til ti h k Ventilation checks Ventilation surveys Air qualityq y System maintenance System inventory Training and

communication

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More InformationMore Information• Workplace Safety North www.healthandsafetyontario.ca/WSN/

– Auxiliary Mine Ventilation manual

– Two day Supervisor’s Ventilation Course

– One day supervisor’s Occupational Health and Industrial Hygiene course

• Ministry of Labour, mining safety www.ontario.ca/MiningSafety

• Ministry of Labour, mining guidelines:

– Health and Safety Guideline Underground Ventilation.

– Health and Safety Guideline Auxiliary Ventilation:y y

Copies of these guidelines can be obtained by contacting the Provincial Coordinator, Mining, at 705‐670‐3050.

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Ventilation Blitz

QUESTIONS

Please submit your question by typing it in on the bottom right hand corner of your screen. W ill l t l tiWe will also accept oral questions now.If we are unable to get to your question before we finish or if you have questions following the webinar, please direct them to [email protected]

Thank you

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Documents

Mine Ventilation: Prepare for the MOL Blitz · Auxiliary Mine Ventilation Manual The objective of auxiliary ventilation in underground mines is to deliver sufficient air quantity