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Related Experiment Videos

Changes in lung function after working with the shotcrete lining method under compressed air conditions.

R Kessel1, M Redl, R Mauermayer

  • 1Institut und Poliklinik für Arbeitsmedizin, Universität München, Federal Republic of Germany.

British Journal of Industrial Medicine
|February 1, 1989
PubMed
Summary

Shotcrete dust exposure in tunnel construction significantly impairs lung function, increasing airway resistance after a single shift and decreasing expiratory flow over two years. Workers should use filter masks and undergo regular lung function tests.

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Area of Science:

  • Occupational Health
  • Pulmonary Medicine
  • Environmental Science

Background:

  • Shotcrete (sprayed concrete) use in tunnel construction is increasing.
  • The health effects of shotcrete dust on lung function are not well understood.

Purpose of the Study:

  • To investigate the acute and chronic effects of shotcrete dust exposure on miners' lung function.
  • To assess the relationship between dust exposure levels and lung function changes.

Main Methods:

  • Lung function tests (spirometry, flow-volume curves) were performed on 30 miners before and after a work shift.
  • Personal air samplers measured total dust exposure.
  • Long-term effects were studied in 29 miners with two years of exposure.

Main Results:

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  • A single shift of shotcrete work led to increased airway resistance and decreased flow-volume parameters.
  • These acute changes showed partial correlation with dust exposure levels.
  • Two years of exposure resulted in a significant decrease in mean expiratory flow (MEF50 and MEF25), indicating small airway damage.

Conclusions:

  • Shotcrete dust exposure causes measurable lung function impairment, particularly affecting small airways.
  • Lung function tests, including flow-volume maneuvers, are crucial for medical surveillance of exposed workers.
  • The use of filter masks is recommended for miners working with shotcrete.