Program Policy Manual - VOLUME V - Mine Safety and Health ...

MSHA PROGRAM POLICY MANUAL VOLUME V
portable fire extinguishers and waterlines equipped with
fire hose outlets and valves required by Sections 75.1100-
2(b) and 75.1100-2(e).
75.1101-3 Water Requirements
The following additional features are to be considered and, unless
deemed not necessary by the District Manager, shall be included in
the installation:
1. When activated, the sensor system (or water flow) should
stop the belt;
2. Sensors and nozzles should be located at or near the
electrical controls, belt takeup and gear reducing units;
3. A manually-operated by-pass valve, located away from the
belt drive, should be installed to furnish water to the
suppression system in the event the automatically
activated valve fails to open;
4. The sensor system required by Section 75.1103 must be
provided with a standby power source maintaining an
operative system for a minimum of 4 hours, unless the belt
haulageway is examined in accordance with Section 75.1103-
4(e);
5. When activated, the sensor (or water flow) shall operate
an effective alarm signal, preferably both audible and
visual. The warning sign must be located at a site where
someone is in constant attendance, such as an attended
belt loading point, section loading point, dispatcher's
office, shop, mine office, lamp house, etc.;
6. The sensor system shall include a warning indicator (or
test circuit) which shows it is in operative condition;
and
7. The system shall require manual shut-off.
The installation of a water deluge system generally requires two
branch lines to provide adequate water on the top of the top belt
and to the surfaces between the two belts. A single branch line
located at the top belt ordinarily does not offer an equivalent
flow pattern. However, the single branch line system can be
considered equivalent when the following conditions are met:
October 2003 (Release V-34) 99