Program Policy Manual - VOLUME V - Mine Safety and Health ...
Program Policy Manual - VOLUME V - Mine Safety and Health ...
Program Policy Manual - VOLUME V - Mine Safety and Health ...
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MSHA PROGRAM POLICY MANAUL <strong>VOLUME</strong> V<br />
Paragraph (a)(2) of this Section requires that at least two<br />
manual actuators should be installed on all continuous-mining<br />
machines <strong>and</strong> machines with dual controls purchased prior to<br />
the effective date of this Section. Some of the smaller<br />
pieces of equipment may be equipped with one actuator.<br />
Paragraph (a)(2)(i) of this Section requires that manual<br />
actuators on remote-controlled equipment shall be within easy<br />
reach of the operator's normal operating position <strong>and</strong> should<br />
be both insulated <strong>and</strong> clearly identified.<br />
Remotely controlled continuous mining machines can be advanced<br />
beyond permanently supported roof while the operator remains<br />
in a location under permanent supports. When continuous<br />
mining machines are advanced inby permanently supported roof,<br />
fire suppression systems cannot be safely actuated as required<br />
by 30 CFR 75.1107-4(a)(2)(ii) unless special precautions are<br />
taken. Currently, there are two acceptable methods for<br />
actuating the fire suppression system on remotely controlled<br />
mining equipment:<br />
1. the system can be manually actuated if, at all times, the<br />
actuator is located where the roof is permanently<br />
supported; or<br />
2. the system can be actuated remotely from a permanently<br />
supported location, <strong>and</strong> the actuation device can be<br />
operated by its own power source, independent of the<br />
electrical power provided by the trailing cable, as<br />
required by 30 CFR 75.1107-4(c).<br />
<strong>Mine</strong> operators presently employing extended-cut mining systems<br />
with continuous miners that are not equipped with fire<br />
suppression systems that can be actuated at all times from a<br />
location under permanently supported roof are in violation of<br />
30 CFR 75.1107-4(a)(2)(ii). Fire suppression systems that<br />
have electrically powered actuation devices that are not<br />
powered independent of the trailing cable for the machine are<br />
in violation of 30 CFR 75.1107-4(c).<br />
A point-type sensor is a bi-metal strip contactor, thermocouple,<br />
or similar device. If other sensors (plastic-covered<br />
wire, radiation, gas, smoke) are used, equivalent protection<br />
shall be pro-vided. <strong>Manual</strong> application at a sprinkler system<br />
should consist of a water hose nozzle arrangement or<br />
equivalent in the immediate vicinity. This type back-up<br />
system is also desirable for other suppression devices.<br />
October 2003 (Release V-34) 116
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