This document discusses methods of auxiliary ventilation used in mines. It describes three categories of auxiliary ventilation applications: supplying air to dead-end areas, supplying uncontaminated air to faces in contaminated environments, and supplying conditioned air in uncomfortable temperatures. The main methods discussed are line brattice, compressed air exhaust, and fans with ventilation pipes. Line brattice involves erecting a curtain to divide an entryway and direct air. Compressed air exhaust uses compressed air from machinery. Fans attached to pipes are considered the most economical method.

1. METHODS OF AUXILIARY
VENTILATION
Presented by:
Umair hassan
Reg.# 0576

2. AUXILIAY VENTILATION
•Auxiliary ventilation is supplying air to
the places in mine where main
ventilation air stream is inadequate or
unavailable.
•The practice of augmenting the main
ventilation system is termed as
auxiliary ventilation.

3. APPLICATIONS OF AUXILIARY
VENTILATION
Three categories:
1- Supplying air to dead-end working places,
both development and production (quantity
control).
2- Supplying uncontaminated air to faces of
working places in contaminated environments
(quality control).
3- Supplying conditioned air to faces of working
places in uncomfortably hot or cold
environment (temperature-humidity
control).

4. METHODS OF AUXILIARY
VENTILATION
1. Line brattice.
2. Compressed-air line or equipment
exhaust.
3. Fan or injector and ventilation pipe or
tubing.

5. LINE BRATTICE
• The erection of a curtain longitudinally in an
entry or a room effectively divides that
opening in two.
• If the brattice is erected form the last
through cross-cut to within a few feet of the
working face, ventilating air can be directed
to the face along one side of the face and
returned along the other side.

6. •The permissible distance of advance
beyond the last cross-cut is precribed
by law and may not exceed 105 ft.
•Line brattice is usually constructed of
fire resistant, burlap-like cloth which is
hung from posts or hangers in roof.

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8. COMPRESSED AIR EXHAUST
• The widespread use of compressed air for
power in metal mine suggest it as an
attractive supplement and substitute for
ventilation.
• Ventilation by direct compressed air
exhaust.
• Compressed air discharge from
compressed air power equipments and
machinery.

9. FAN AND VENTILATION PIPE
•Most economical and desirable
method.
•Fans attached to pipes or tubing.
•Small electric powered fans .

10. •A single length of vent pipe or tubing is
suspended in the working place from
timber sets or hangers in the back or
walls and attached to a small auxiliary
fan, usually a blower but sometimes a
booster or an exhauster.