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Mining Publication: Method Factors for Anemometer Measurement at Pipe Outlets
Keywords: Anemometers Data analysis Gob gas vent holes Methane
Original creation date: January 1987
Authors: F Garcia, J Cervik
Report of Investigations - January 1987
Download PDF Document (1.02 MB)
NIOSHTIC2 Number: 10005324
U.S. Department of the Interior, Bureau of Mines. Report of Investigations 9061, 1987; :1-10
Gob holes are routinely used by the mining industry to vent methane from gobs and to prevent it from entering the mine ventilation system. In some cases, flows from gob holes are measured by centering an anemometer on the end of a discharge pipe. These measurements are erroneous and tend to be high by as much as 30 pct. The Bureau of Mines determined method factors (correction factors) for anemometer measurements taken in this manner. Method factors for 4-, 6-, and 8-in (10.2-, 15.2-, and 20.3-cm) ID pipe are 0.68, 0.71, and 0.78, respectively. Comparisons between horizontal and vertical flows indicated no significant change in method factors. Consequently, the method factors for horizontal pipe flows can be applied to vertical upward flows.
Image of publication Method Factors for Anemometer Measurement at Pipe OutletsReport of Investigations - January 1987
Download PDF Document (1.02 MB)
NIOSHTIC2 Number: 10005324
U.S. Department of the Interior, Bureau of Mines. Report of Investigations 9061, 1987; :1-10
See Also
Comparisons Between Cross-Measure Boreholes and Surface Gob Holes
Effect of a Surface Borehole on Longwall Gob Degasification (Pocahontas No. 3 Coalbed)
Forecasting Gob Gas Venthole Production Performances Using Intelligent Computing Methods for Optimum Methane Control in Longwall Coal Mines
Longwall Gob Degasification With Surface Ventilation Boreholes Above the Lower Kittanning Coalbed
Methane Diffusion Parameters for Sized Coal Particles: A Measuring Apparatus and Some Preliminary Results
A New Methane Control and Prediction Software Suite for Longwall Mines
Remote Methane Sensors
Reservoir Simulation-Based Modeling for Characterizing Longwall Methane Emissions and Gob Gas Venthole Production
Stochastic Modeling of Gob Gas Venthole Production Performances in Active and Completed Longwall Panels of Coal Mines
Using Ultrasonic Anemometers to Evaluate Face Ventilation Conditions
Page last reviewed: September 21, 2012
Page last updated: September 21, 2012
Content source: National Institute for Occupational Safety and Health, Mining Program
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