Underground Mine Gas Monitoring

Application Notes

Application Background                                                                                                                                      Printer Friendly Version

Gas buildup in underground mines is very dangerous as it can cause explosions which can result in injury or loss of life for mine workers. Such explosions are also costly as mine tunnels, mine shafts and expensive mining equipment can be destroyed.

UNDERGROUND MINE GAS MONITORING

Mines have ventilation equipment to ensure there is no gas buildup but the control of these ventilation systems is difficult if there is no information on the gas levels within the mine.

Gas buildup in underground mines is very dangerous

This application note details how monitoring in a mine may be achieved.

The Neon Remote Terminal / WiFi can be used in this application with data being transferred from the Neon Remote Terminals via the existing WiFi system to a Neon Server within the Mine Administration building on the surface.

Application Detail

There are many manufacturers of gas monitoring equipment. One such manufacturer is Draeger which provides explosion proof and intrinsically safe gas monitors to measure noxious gases such as CO, CO2, NO, H2S, SO2 as well as O2 and N.
These instruments typically provide a 4-20mA analog output or a Modbus output which can be read by Neon Remote Terminal or Module routinely, perhaps every 1, 5 or 10 minutes to be logged, alarm limit checked and then transmitted via a communication channels to a Neon Server on a regular schedule, perhaps every 5 minutes.

Underground mines typically have one or more mine shafts and many tunnels leading from those mine shafts and one or more ventilation shafts. Neon Remote Terminal or Module Gas Monitor Stations can be set up at many different locations within the mine to monitor gas and other local conditions, such as temperature, humidity and perhaps dust and sound.

Underground mines ventilation monitoring using Unidata equipment

Underground mines generally have an existing communications system within the mine. Old mines had wired systems, like a telephone. Modern mines have wireless communications systems either cell phone based or standard 802. WiFi based, with a leaky feeder / leaky coax antenna throughout the mine, and WiFi access points.

The Neon Remote Terminal / WiFi can be used in this application with data being transferred from the Neon Remote Terminals via the existing WiFi system to a Neon Server within the Mine Administration building on the surface.

UNDERGROUND MINE GAS MONITORING

The Neon Server can be used to check gas and other ambient parameters at each measuring station / at each Neon Remote Terminal and display information on a standard web browser and on a schematic diagram of the overall mine to highlight any out of limit ambient or gas parameter.
The Neon Remote Terminal can also be programmed to increase or decrease ventilation in the mine based on the current measurements.
The Neon Server can be set up to check incoming data for any out of limit conditions and activate an alarm. Alarm actions can be set up to activate visual or audible alarm indicators. Alarm actions can also be set up to email and text mine staff and mine safety officers to alert them of any out of limit / any dangerous conditions.

Typical Configuration

Drager Gas Detection Instrument, Drager MiniWarn CO2 / CO Gas Monitor
>Drager Gas Detection Instrument, Drager PAC 3000/5000/7000 Monitor CO2 / CO Gas Monitor

Options for Neon Telemetry - NRT / RTU / Field UnitsUnidata Part NumberDescription
Cellular RTU 3G2013F-AB03Neon Metering Module 3G with Antenna and Li Battery
Cellular RTU 4G2013F-AB04Neon Metering Module 4G with Antenna and Li Battery
Cellular RTU 3G - Industrial2016F-AB03Neon Remote Terminal 3G with Antenna and Li Battery
Cellular RTU 4G - Industrial2016F-AB04Neon Remote Terminal 4G with Antenna and Li Battery
Low Earth Orbit Satellite Globalstar2015E-AB0Neon Remote Terminal - Satellite Globalstar Modem with Antenna and three Li Batteries
Ethernet2017E-0B0-1 or 3NRT Ethernet with single or triple Ethernet Ports
with three Li Batteries
Equatorial Orbit Satellite - Inmarsat2018E-AB0-1 or 3NRT Ethernet with single or triple Ethernet Ports
with three Li Batteries
LCD Display2500ENRT LCD Display
NRT Field Termination Strip2103F2015E,2016F,2017E, and 2018E NRT FTS
NRT Firmware Option2303A-8M8M Extended Memory Option
NRT Firmware Option2303A-8M-CAM8M Extended Memory & Serial Camera Option
NRT Firmware Option2303A-CAMSerial Camera Option
Options for Neon Application Software - Customer ServerUnidata Part NumberDescription
Neon Application Software2302ANeon Server Software Licence Incl 5 NAL
Neon Application Software2302A-10Additional 10 NRT Access Licences
Neon Application Software2302A-20Additional 20 NRT Access Licences
Neon Application Software2302A-50Additional 50 NRT Access Licences
Options for Neon Application Software - Unidata ServerUnidata Part NumberDescription
Neon Application Software2301ANeon Data Initial Subscription Setup Fee
Neon Hosting Service2301A-01Neon Data Service Fee for 1-50 NRTs
Neon Hosting Service2301A-02Neon Data Service Fee for 51-100 NRTs
Neon Hosting Service2301A-10Neon Data Service Fee Metering
Options for Conventional Dataloggers / Field UnitsUnidata Part NumberDescription
Standards Starlogger6004D-11Red Logger 512K with Alkaline Battery
Display Starlogger6004D-21Blue Logger 512K with LCD and Alkaline Battery
Prologger7001D-11Green Logger 1M with LCD and Alkaline Battery
Micrologger8010C-EURMicrologger 512K
Starlogger Field Termination Strip6103E6004D FTS
Prologger Field Termination Strip7100E7001D FTS
Starlog V4 Management Software6308A-AUEStarlog V4 Full Licence Key