This document discusses auxiliary ventilation in mines. Auxiliary ventilation is needed to supply air to working places in mines when the main ventilation stream is inadequate or unavailable. This is often necessary for development work where places advance beyond moving air, and in room-and-pillar and some stopping mining methods. There are many applications of auxiliary ventilation that can be grouped into three categories: supplying air to dead-end working places, supplying uncontaminated air to working faces, and supplying conditioned air to faces where temperature and humidity need to be controlled.

1. By
Kalim Ullah

2.  Problems arise in the ventilation of working
places in mines where the main-ventilation
air stream is inadequate or unavailable.
 Reliance then must be placed on
supplemental means of supplying air.
 The practice is termed as auxiliary
ventilation.

3.  The necessity for auxiliary ventilation exists
because;
working places in most mining systems are continually
being advanced beyond the main ventilation air stream.
 Blind or dead-end workings are characteristic of
development work in mining,
 But even “production” (exploitation) workings
sometimes advance beyond moving air,
 Particularly in room-and-pillar and some
stopping methods.

4.  There are many number of common
applications but they all may be grouped into
three categories:
1. Supplying air to dead-end working places
(quantity control)
2. Supplying uncontaminated air to faces of
working places (quality control)
3. Supplying conditioned air to faces of working
places in unconformity (temp-humidity control)

5. Questions??