*****************************************************************
Editorial Note: Based on FedReg. Doc. E8-30639, this section has been changed.
The new version is in BOLD. The old section will remain, pending the next publication of the 30 CFR.
The effective date for this is December 31, 2008. The compliance dates are as follows:
Each mine operator shall comply with the following sections by the dates listed below.
1. § 48.27(a) and §§ 75.156(a),
75.350(b), and 75.1731 by March 2,
2009.
2. § 75.333(c)(4) by March 31, 2009.
3. §§ 75.380(d)(7), 75.380(f),
75.381(e)(5), and 75.381(f) by June 30,
2009.
4. §§ 75.350(a)(2), 75.351(e)(2),
75.1103–4(a), 75.1108(a), and 75.1108(b)
December 31, 2009.
5. § 75.1108(c) by December 31, 2018.
*****************************************************************
30 CFR § 75.1103-4
Automatic fire sensor and warning device systems; installation; minimum requirements.
(a) Automatic fire sensor and warning device systems shall provide
identification of fire within each belt flight (each belt unit operated by a
belt drive).
(1) Where used, sensors responding to temperature rise at
a point (point-type sensors) shall be located at or above the elevation of
the top belt, and installed at the beginning and end of each belt flight, at
the belt drive, and in increments along each belt flight so that the maximum
distance between sensors does not exceed 125 feet, except as provided in
paragraph (a)(3) of this section.
(2) Where used, sensors responding to radiation, smoke,
gases, or other indications of fire, shall be spaced at regular intervals to
provide protection equivalent to point-type sensors, and installed within the
time specified in paragraph (a)(3) of this section.
(3) When the distance from the tailpiece at loading points
to the first outby sensor reaches 125 feet when point-type sensors are used,
such sensors shall be installed and put in operation within 24 production
shift hours after the distance of 125 feet is reached. When sensors of the
kind described in paragraph (a)(2) of this section are used, such sensor
shall be installed and put in operation within 24 production shift hours
after the equivalent distance which has been established for the sensor from
the tailpiece at loading points to the first outby sensor is first
reached.
(a) Effective December 31, 2009, automatic fire sensor and warning
device systems that use carbon monoxide sensors shall provide
identification of fire along all belt conveyors.
(1) Carbon monoxide sensors shall be installed at the following
locations:
(i) Not more than 100 feet downwind of each belt drive unit, each
tailpiece transfer point, and each belt take-up. If the belt drive,
tailpiece, and/or take-up for a single transfer point are installed
together in the same air course, and the distance between the units is
less than 100 feet, they may be monitored with one sensor downwind of
the last component. If the distance between the units exceeds 100 feet,
additional sensors are required downwind of each belt drive unit, each
tailpiece transfer point, and each belt take-up;
(ii) Not more than 100 feet downwind of each section loading point;
(iii) Along the belt entry so that the spacing between sensors does
not
exceed 1,000 feet. Where air velocities are less than 50 feet per
minute, spacing must not exceed 350 feet; and
(iv) The mine operator shall indicate the locations of all carbon
monoxide sensors on the mine maps required by Sec. Sec. 75.1200 and
75.1505 of this part.
(2) Where used, sensors responding to radiation, smoke, gases, or
other indications of fire, shall be spaced at regular intervals to
provide protection equivalent to carbon monoxide sensors, and installed
within the time specified in paragraph (a)(3) of this section.
(3) When the distance from the tailpiece at loading points to the
first outby sensor reaches the spacing requirements in Sec. 75.1103-
4(a)(1)(iii), an additional sensor shall be installed and put in
operation within 24 production shift hours. When sensors of the kind
described in paragraph (a)(2) of this section are used, they shall be
installed and put in operation within 24 production shift hours after
the equivalent distance which has been established for the sensor from
the tailpiece at loading points to the first outby sensor is first
reached.
(b) Automatic fire sensor and warning device systems shall be
installed so as to minimize the possibility of damage from roof falls and the
moving belt and its load.
(b) Automatic fire sensor and warning device systems shall be
installed so as to minimize the possibility of damage from roof falls
and the moving belt and its load. Sensors must be installed near the
center in the upper third of the entry, in a manner that does not
expose personnel working on the system to unsafe conditions. Sensors
must not be located in abnormally high areas or in other locations
where air flow patterns do not permit products of combustion to be
carried to the sensors.
(c) Infrared, ultraviolet, and other sensors whose effectiveness is
impaired by contamination shall be protected from dust, dirt, and
moisture.
(d) The voltage of automatic fire sensor and warning device systems
shall not exceed 120 volts.
(e) Except when power must be cut off in the mine under the
provisions of §75.313, automatic fire sensor and
warning device systems shall be capable of giving warning of fire for a
minimum of 4 hours after the source of power to the belt is removed unless
the belt haulageway is examined for hot rollers and fire as provided in
paragraph (e)(1) or (2) of this section.
(1) When an unplanned removal of power from the belt
occurs an examination for hot rollers and fire in the operating belts of a
conveyor system shall be completed within 2 hours after the belt has
stopped.
(2) When a preplanned removal of power from the belt
occurs an examination for hot rollers and fire on the operating belts of a
conveyor system may commence not more than 30 minutes before the belts are
stopped and shall be completed within 2 hours after the examination is
commenced, or the examination shall be commenced when the belts are stopped
and completed within 2 hours after the belts are stopped.
[37 FR 16545, Aug. 16, 1972, as amended at 57 FR 20928, May 15, 1992]
EFFECTIVE DATE NOTE: At 57 FR 20928, May 15, 1992, §75.1103-4 was amended by
revising paragraph (e) introductory text, effective August 16, 1992.