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DEVELOPMENT AND INTEGRATION OF VENTILATION SIMULATION TOOLS FOR COLLIERY VENTILATION PRACTICE Leon van den Berg, Kobus v

DEVELOPMENT AND INTEGRATION OF VENTILATION SIMULATION TOOLS FOR COLLIERY VENTILATION PRACTICE Leon van den Berg, Kobus van Zyl, Wynand Marx BBE Consulting, South Africa Andrew Thomson Anglo Coal Operations Limited - Anglo Coal, South Africa. Presentation Overview. Background

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DEVELOPMENT AND INTEGRATION OF VENTILATION SIMULATION TOOLS FOR COLLIERY VENTILATION PRACTICE Leon van den Berg, Kobus v

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  1. DEVELOPMENT AND INTEGRATION OF VENTILATION SIMULATION TOOLS FOR COLLIERY VENTILATION PRACTICE Leon van den Berg, Kobus van Zyl, Wynand Marx BBE Consulting, South Africa Andrew Thomson Anglo Coal Operations Limited - Anglo Coal, South Africa

  2. Presentation Overview • Background • Mine ventilation software developed • Mine ventilation simulation integration • Current practices • Typical design and modeling approach • Simulation as part of the planning process • Case study • Questions

  3. Background • Mine ventilation simulation software not new • Faster and improved mine vent assessment • Improved health and safety • Mine vent optimization and LoM planning • Energy efficient • Cost effective ventilation design

  4. VUMA-Network • Windows based software • Network graphically constructed • Consist of branches and nodes • Input data for branches and nodes • Steady state environmental conditions • Aero, contaminant and thermo solutions • Results: • Reporter • 3D Viewer

  5. VUMA-Coal • Coal mine specific terminology • Vent wall leakage control • New graphic model construction methods • Main development branch • Integrated leakage components • Air crossing • No thermo solution • Maximum depth of 500 m

  6. VUMA-Coal Leakage Calculation • Based on work done by Martinson in 1985 • Modeling of parallel leakage paths • Use fixed resistance factor per wall [ΔP based] • Cannot model every vent wall in a coal mine • Equivalent leakage for “path length” • Based on • Combined cross sectional wall area for path length • Wall resistance • Path length specified by user • Calibrated and verified in the field

  7. Field Trials - Leakage

  8. VUMA-Coal Main Development Branch

  9. VUMA-Coal Main Development Branch

  10. VUMA-Coal Main Development Branch

  11. VUMA-Coal Main Development Branch

  12. VUMA-Coal Main Development Branch

  13. VUMA-Coal Air Crossing • Added resistance in system • Use control manager to add resistance into system • Field verified • Air Crossing graphic input component

  14. VUMA-Coal Air Crossing

  15. Simulation as Part of The Planning Process OPERATIONAL SIMULATION LoM PLANNING

  16. Mine Ventilation System and Design Process • Obtain mine ventilation network layout and standards • Construct an operational simulation model • Calibrate operational model with actual vent data • Determine critical “snap-shots” over LoM • Solve and optimize airflow • Determine airflow profiles over LoM • Liaise with mine planning team • Document inputs and results

  17. Case Study • Anglo Coal Greenside Colliery • 3 sections in the north and 1 in the south • North mining far away from infra-structure • Need to move all sections north • This will require 45 m3/s more air in the north • Proposed actions • Seal off abandoned areas in the South • Seal off workings of old section in the south

  18. Case Study

  19. 40 m3/s 25 m3/s 110 m3/s Case Study Results 65 m3/s =

  20. General Benefits Using Mine Vent Simulation • Benefits achieved by Anglo Coal • A number of considered RBH with fan stations not required [$ 3 million saving in 2006]. • Improved LoM vent capital scheduling • Indicated new ventilation infrastructure requirements [and scheduling]. Production losses avoided • VUMA-coal models specified all future fan station aerodynamic design criteria • Documented reviews allow continuity in future as LoM OPEX and CAPEX schedules

  21. Conclusions • VUMA-coal proven to be necessary design tool • VUMA-coal successfully integrated into mine planning process

  22. ACKNOWLEDGEMENT Anglo Coal for their support of VUMA-coal and for allowing the examples and case study to be published in this paper.

  23. Questions ?

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