Study of Conditions near Mine Seals
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Study of Conditions near Mine Seals. Abandoned mines, whether sealed or not, are often located on public lands that are used for camping, hiking, hunting, and other forms of recreation. Sealed mines can be hazardous to passersby. Hazards may include :

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Abandoned mines, whether sealed or not, are often located on public lands that are used for camping, hiking, hunting, and other forms of recreation. Sealed mines can be hazardous to passersby.


  • Hazards may include public lands that are used for camping, hiking, hunting, and other forms of recreation. Sealed mines can be hazardous to passersby.:

  • Pressure may build up in the sealed opening, leading to a catastrophic failure of the seal.

  • Hazardous gases, including methane and radon daughters, may leak through the seal and accumulate nearby. Where the seal is recessed from the surface, such accumulation may be more likely.

  • Where the seal is recessed from the surface, gases may stratify by specific gravity, leading to a local concentration of hazardous gases.

  • Again, where the seal is recessed from the surface, oxygen may be depleted—naturally or by the presence of humans or animals.


  • Project activities public lands that are used for camping, hiking, hunting, and other forms of recreation. Sealed mines can be hazardous to passersby.:

  • CFD modeling

  • Monitoring of sealed mines

Pressure, Pa

Velocity, m/s

Wind Direction

Wind Direction


  • Respiration simulation: public lands that are used for camping, hiking, hunting, and other forms of recreation. Sealed mines can be hazardous to passersby.

  • Ten people conducting moderate activity

  • Center of the floor of a space that is 10 by 25 by 20 ft


O public lands that are used for camping, hiking, hunting, and other forms of recreation. Sealed mines can be hazardous to passersby.2 content at 550 seconds


CO public lands that are used for camping, hiking, hunting, and other forms of recreation. Sealed mines can be hazardous to passersby.2 content at 550 seconds


O public lands that are used for camping, hiking, hunting, and other forms of recreation. Sealed mines can be hazardous to passersby.2 content at 1,280 seconds


CO public lands that are used for camping, hiking, hunting, and other forms of recreation. Sealed mines can be hazardous to passersby.2 content at 1,280 seconds


O public lands that are used for camping, hiking, hunting, and other forms of recreation. Sealed mines can be hazardous to passersby.2 content at 5,460 seconds


CO public lands that are used for camping, hiking, hunting, and other forms of recreation. Sealed mines can be hazardous to passersby.2 content at 5,460 seconds


Monitoring System public lands that are used for camping, hiking, hunting, and other forms of recreation. Sealed mines can be hazardous to passersby.


Monitoring System public lands that are used for camping, hiking, hunting, and other forms of recreation. Sealed mines can be hazardous to passersby.


Yellow cat mining district uranium mine monitoring

Yellow Cat Mining District Uranium Mine Monitoring public lands that are used for camping, hiking, hunting, and other forms of recreation. Sealed mines can be hazardous to passersby.


Objectives
Objectives public lands that are used for camping, hiking, hunting, and other forms of recreation. Sealed mines can be hazardous to passersby.

  • Test the equipment in the field

    • Datalogger

    • Sensors and batteries

  • Check the mine entrance for:

    • Temperature

    • Barometric pressure

    • CO, CO2, and LEL Levels

    • Wind velocity and direction


Location
Location public lands that are used for camping, hiking, hunting, and other forms of recreation. Sealed mines can be hazardous to passersby.


Location1
Location public lands that are used for camping, hiking, hunting, and other forms of recreation. Sealed mines can be hazardous to passersby.


Location2
Location public lands that are used for camping, hiking, hunting, and other forms of recreation. Sealed mines can be hazardous to passersby.


Location3
Location public lands that are used for camping, hiking, hunting, and other forms of recreation. Sealed mines can be hazardous to passersby.


Location4
Location public lands that are used for camping, hiking, hunting, and other forms of recreation. Sealed mines can be hazardous to passersby.

Parking Area

Entrance to Monitor


View from parking area to mine entrance
View from parking area to mine entrance public lands that are used for camping, hiking, hunting, and other forms of recreation. Sealed mines can be hazardous to passersby.

Mine Entrance


View from parking area to mine entrance1
View from parking area to mine entrance public lands that are used for camping, hiking, hunting, and other forms of recreation. Sealed mines can be hazardous to passersby.

Mine Entrance


View from the mine entrance to the parking area
View from the mine entrance to the parking area public lands that are used for camping, hiking, hunting, and other forms of recreation. Sealed mines can be hazardous to passersby.


Equipment setup
Equipment Setup public lands that are used for camping, hiking, hunting, and other forms of recreation. Sealed mines can be hazardous to passersby.

  • The equipment was placed in a plastic cart and put in front of the mine entrance to check for temperature, barometric pressure, gases, wind velocity, and wind direction

  • The datalogger was provided with a 12-V battery for most of the sensors; the CO2 sensor used two 12-V batteries in series to provide 24 V

  • Setup time was around 2.5 hours


Equipment setup1
Equipment Setup public lands that are used for camping, hiking, hunting, and other forms of recreation. Sealed mines can be hazardous to passersby.

Temperature Sensor

Wind Direction and Velocity Sensor

Cart with gas detectors

Datalogger


Equipment setup2
Equipment Setup public lands that are used for camping, hiking, hunting, and other forms of recreation. Sealed mines can be hazardous to passersby.

Wind Direction Sensor

Wind Velocity Sensor

Temperature Sensor


Equipment setup3
Equipment Setup public lands that are used for camping, hiking, hunting, and other forms of recreation. Sealed mines can be hazardous to passersby.

Barometric Pressure Sensor

Datalogger


Equipment setup4
Equipment Setup public lands that are used for camping, hiking, hunting, and other forms of recreation. Sealed mines can be hazardous to passersby.

CO2 Sensor

LEL Sensor

CO Sensor


Air temperature
Air Temperature public lands that are used for camping, hiking, hunting, and other forms of recreation. Sealed mines can be hazardous to passersby.


Barometric pressure inhg
Barometric Pressure (inHg) public lands that are used for camping, hiking, hunting, and other forms of recreation. Sealed mines can be hazardous to passersby.


Co c5h12 lel
CO-C5H12(LEL) public lands that are used for camping, hiking, hunting, and other forms of recreation. Sealed mines can be hazardous to passersby.


Wind speed m s
Wind Speed m/s public lands that are used for camping, hiking, hunting, and other forms of recreation. Sealed mines can be hazardous to passersby.


Wind direction
Wind Direction public lands that are used for camping, hiking, hunting, and other forms of recreation. Sealed mines can be hazardous to passersby.


Radon Progeny public lands that are used for camping, hiking, hunting, and other forms of recreation. Sealed mines can be hazardous to passersby.


The concentration of radon daughters is measured in working level (WL) units. This is a measure of the concentration of potential alpha particles per litre of air.

The worker's exposure to radon daughters is expressed in units of Working Level Months (WLM). One WLM is equivalent to 1 WL exposure for 170 hours.

1 WL = 130,000 MeV alpha energy per liter air

          = 20.8 µJ (microjoules) alpha energy per cubic meter (m3) air

WLM = Working Level Month

         = 1 WL exposure for 170 hours


  • Future activity level (WL) units. This is a measure of the concentration of potential alpha particles per litre of air.

  • Return to Yellow Cat and monitor a sealed entry for 24-36 hours

  • Install the monitoring system at Aberdeen Mine (inactive) and monitor for ~ 1 week


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