Mine Ventilation Quiz 1 Flashcards
There is evidence to suggest that the need to establish ventilation circuits with intake and return airways was understood and practiced by the Greeks.
Pre Middle Ages
Mine ventilation practices of the day are illustrated and described in “De Re Metallica”, by Georgius Agricola, 1556. This was amongst the first books ever printed and remained a standard mining text for the next 200 years.
Middle Ages - Industrial Revolution
Who wrote “De Re Metallica” which was published in 1556?
Gerogius Agricola/Georg Bauer
This book describes horse and human powered centrifugal fans; bellows connected to wooden conduits, ventilation doors and shaft collar deflectors, which divert winds into the mine workings.
De Re Metallica
This period saw an unprecedented increase in demand for mineral commodities including coal, metalliferous ores and industrial minerals. Substantial growth in mining activity, (much of it underground) was required
to satisfy this new demand.
Industrial Revolution – Information Age
Larger scale mining led to increasing numbers of miners suffering from health problems contributed to by poor ventilation. Enumerate the 3 problems may arise due to poor ventilation.
- black lung
- mine explosions
- fires
Who is the British mining agent whom presented his famous paper “On the Theory of the Ventilation of Mines” in 1854 and _______’s Equation still forms the basis for all mine ventilation engineering.
John Atkinson
The most notable feature has been the development of computerized mine ventilation network analysis. This has made prediction of fan requirements and airflow distributions in complex mine ventilation circuits feasible using
desktop computers.
Information Age
A type of gas detectors, which is the first detector that was used, and was commonly used by miners to help alert them to the presence of toxic vapors such as the odorless carbon monoxide in hazardous areas of underground mining pits.
Canary Bird
A type of gas detectors encapsulated in a flame-arrestor shell so that there was no way the flame could ignite the outside atmosphere. On the outside of it was a glass piece that had three incisions running horizontally along the glass.
Flame Light
This sensor is made of two platinum wires positioned within a ceramic mass. Both wires are connected to a Wheatstone bridge circuit. Part of the ceramic mass contains a bead catalyst
responsible for oxidation and an additional ceramic bead that will inhibit the process of
oxidation.
Pellistor
A type of gas detector engineered with a dual beam, have become the preferred method to monitoring gas. Carry a wide measurement range which allows for the detection of gas concentrations from a few parts per million to 100%. There is a rapid response rate, approximately 0.1 seconds from the time it takes for the gas to enter the analyzer to the time it takes to measure the gas concentration.
Infrared Led Gas Detectors
Enumerate the History of Mine Ventilation
- Ability of fire to promote airflow was discovered
- Need for a connected ventilating circuit was discovered
- Sending of fireman covered with damped sack cloth to burn out methane became a common method for removing methane
- Use of Steel Flint Mill for illuminating mines
- Introduction of “Dumb Drifts”
- Invention of Davy Lamp
- Discovery of panel ventilation innovation
- “Theory of the ventilation of mines” was presented by Atkinson to the Institute of Mining Engineers in England
- John Job Atkinson’s Principles on mine ventilation were put into practice
- Use of analogue computers to facilitate ventilation planning
What does the early flint miners built at the working faces of the mines?
Brushwood fires
A common method of removing methane was to send a _____ in before each shift, covered in sack cloths dowsed in water and carrying a candle on the end of a long rod. It was his task to burn out the methane before the miners went into the working faces.
fireman
John Buddle (1773-1843), an eminent mining engineer in the north of England, produced two significant improvements. What is it?
- Dumb Drifts
- Panel Ventilation
Originally, air flowed sequentially through work areas, one after the other, continually increasing in methane concentration.
Panel Ventilation
Who produced another classical paper advancing understanding of the behavior of airflow by using thermodynamic analyses?
Professor F. B. Hinsley
This device relied on a piece of flint being held against a rapidly revolving steel wheel. The latter was driven through a gear mechanism by a manually rotated handle. Invented by Carlisle Spedding.
steel flint mill
Within a short period of experimentation he found that the flame of burning methane would not readily pass through a closely woven wire mesh. The Davy lamp had arrived in 1815.
Humphrey Davy
Enumerate and arrange the mine gases from the top to the bottom.
- Methane
- Carbon Monoxide
- Air
- Oxygen
- Carbon Dioxide
- Hydrogen Sulfide