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Flow Rates and Pressure Measurements

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Mine Ventilation

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Abstract

In the previous chapter, an overview of environmental conditions in mining was offered from the viewpoint of occupational health. In this chapter, that summary is fleshed out by considering measurement and control of the main physical variables in a ventilation system. In general, these variables are pressures, airflow speeds and, indirectly, flow rates. These measurements, which are crucial in guaranteeing an airflow for miners and for the equipment used, are among the main inputs for mathematical models of ventilation. This section covers the main techniques and devices used in determining them.

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Notes

  1. 1.

    The European Commission restricts the use of measuring devices containing mercury under Commission Regulation (EU) No 847/2012.

  2. 2.

    To calculate the average speed of an air current, the speed should be directly averaged. That is to say, if dynamic pressures are obtained, for example by means of a Pitot tube, they should first be transformed into speeds, and then averaged. This is the case because dynamic pressure is proportional to the square of air speed.

  3. 3.

    Some quadrilaterals formed in the adjacent to the walls are discarded for practical reasons.

  4. 4.

    This conditions aim for thorough mixing and equilibrium.

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Authors and Affiliations

  1. Department of Mining, Topography and Structure Technology, University of Leon, León, Spain

    Carlos Sierra

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  1. Carlos Sierra
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Correspondence to Carlos Sierra .

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Sierra, C. (2020). Flow Rates and Pressure Measurements. In: Mine Ventilation. Springer, Cham. https://doi.org/10.1007/978-3-030-49803-0_3

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  • DOI: https://doi.org/10.1007/978-3-030-49803-0_3

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  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-030-49802-3

  • Online ISBN: 978-3-030-49803-0

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