Short Courses

Half day short course: (Includes one coffee break and course notes)

Registration fee: $175 for regular / $50 for student 


Full day short course: (Includes two coffee breaks, lunch and course notes)

Registration fee: $375 for regular / $100 for student 

Sunday, April 28 - Half-Day Short courses

  • 08:00-12:00 | Fans and Fan Systems

    Facilitators: Livio Salvestro & Glenn Savage

     

    The 4 hour course content will cover:

    • Introduction to the different fan types available (centrifugal, vane axial and mixed flow).
    • Examination of performance characteristics for vane axial and mixed flow fans
    • Fundamental relationships defining geometric similarity, viscosity, Reynolds number, laminar and turbulent flow, boundary layer theory and basic aerofoil’s.
    • Detailed examination of aerofoil stall, stall cell propagation, rotating stall, surge and stall.
    • Hagen line method for evaluating fan system stability (parallel operation of fans).
    • Detailed examination of relationship between mine ventilation requirements as determined by modeling and fan performance for upcast, downcast, push/pull and underground booster fan applications.
    • overview of fan testing procedures and standards
    • Fan performance and reliability/availability considerations.
    • Vod risks for highly stressed fan rotors. Speed changes imposes fatigue stress cycles.
    • Suitability of different fan types for mine ventilation applications. Not all are equally suitable!
  • 13:00-17:00 | Mobile equipment power source – Impact on ventilation design

    Facilitators: Cheryl Allen, Manager Ventilation Design & Tech Support¸ Vale and 
    Jozef Stachulak, Manager Strategic Vent & Diesel Research, Mirarco

    Mobile mining equipment powered by the diesel engine has proven very valuable and flexible in its use; however, it also has a disadvantage of emitting heat, gaseous substances and diesel particulate matter (DPM).  The World Health Organization has confirmed that diesel emissions are a known carcinogen resulting in regulations allowing less exposure to contaminants.  The requirement to curtail emissions and at the same time realizing a substantial increase in the cost of power and fuel; there is incentive to replace the diesel engine with an alternative power source such as a battery motor.  Ventilation systems are necessary to dilute and remove contaminants from the mine; however, they      are both capital and operating cost intensive, with a typical base metal Canadian mine ventilation system consuming between 50%-80% of the site’s power demand.  Reducing the airflow into a mine will result in a significant drop in power consumption; therefore, the alternative of mine designs employing battery/electric equipment as well as new mine project feasibility studies are underway.

    This workshop will discuss ventilation design and the impact when diesel powered equipment is replaced and/or integrated with battery powered equipment in stages or in full.

Sunday, April 28 - Full-Day Short courses

  • 09:00-17:00 | Planning of Refrigeration and Ventilation of Hot Mines

    Facilitators: Andrew Branch, General Manager, BBE Projects (SA),
    Morné Beukes, Senior Consultant, BBE Consulting (SA),
    Stephen Hardcastle, Managing Director, BBE

    Mine refrigeration is no longer limited to a few exceptional areas in the world. Every continent with mines, now has operations that require refrigeration to ensure acceptable working conditions. This can be a function of climate and/or mining depth. In North America, especially Canada, as mines head to 3 km depth, there is a growing interest in mine refrigeration.

    The need for refrigeration has a fundamental impact on the overall ventilation planning and mine design. With the introduction of BEVs, or as a function of depth, the dilution of diesel exhaust emissions becomes a less dominant ventilation design criteria. However, ventilation remains an efficient medium to deliver cooling and remove heat, it is also required to maintain appropriate air speeds in the work-space.

    This short course will cover the basic cooling-heat energy balance which leads to a hierarchy of best cooling strategies as related to depth in different mining areas. The workshop will examine the different cooling generation and distribution options. This will be supplemented by numerous case studies through real, implemented large mine cooling and ventilating systems from around the world [with a large amount of photographic material].

    The course media will be supplied on a memory stick, laptops are suggested.

    The preliminary programme will be:

    • Background, why and when do mines require refrigeration
    • Traditional primary ventilation design norms and myths debunked for genuine hot mines
    • Heat loads and cooling balances
    • Mine refrigeration machinery
    • Surface cooling installations and underground cooling installations
    • Novel cooling systems
    • Primary ventilation guidelines for hot mines