Measurement Of Methane Pressure By
Gas-pressure-measurement-tube Sets
In Underground Coalbeds
Author(s)
S. Torno, E. Alvarez, B. Arias & J. Toraño
Abstract
Sudden methane outbursts which often cause serious accidents with numerous
fatalities can be produced in underground coalbed roadways and when driving
tunnels for highways or railways passing through carboniferous materials.
Most of the factors which take part in the generation of sudden outbursts are
related to methane conditions into the coalbed and specifically to gas pressure
and coal permeability.
When excavating roadways or tunnels crossing coalbeds, it is convenient to
have easy to use equipment which allows us to know at any moment the
measured pressure and its variation in factors such as roadway and tunnel driving
velocity, geological faults which lead to fractured formations and natural or
induced overstresses.
The designed gas-pressure-measurement-tube set goes into an 8 m deep and
45 mm in diameter borehole drilled in front of the working face. The gaspressure-
measurement-tube set is connected to a flexible rod with a manometer
at the end of it.
The obtained measurements are used both in the empirical formulae and in
Computational Fluid Mechanics; this allows us to predict the probability of the
occurrence of sudden outbursts.
Keywords: gas pressure, methane, outburst, gas-pressure-measurement tube,
underground mine.
Keywords
gas pressure, methane, outburst, gas-pressure-measurement tube,
underground mine
Related Book
Other papers in this volume
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