30 CFR § 75.371
Mine ventilation plan; contents.
The mine ventilation plan shall contain the information described below
and any additional provisions required by the district manager:
(a) The mine name, company name, mine identification number, and the name
of the individual submitting the plan information.
(b) Planned main mine fan stoppages, other than those scheduled for
testing, maintenance or adjustment, including procedures to be followed
during these stoppages and subsequent restarts (see §75.311(a)) and the type of device to be used for monitoring main
mine fan pressure, if other than a pressure recording device (see
75.310(a)(4)).
(c) Methods of protecting main mine fans and associated components from
the forces of an underground explosion if a 15-foot offset from the nearest
side of the mine opening is not provided (see §75.310(a)(6)); and the methods of protecting main mine fans and
intake air openings if combustible material will be within 100 feet of the
area surrounding the fan or these openings (see §75.311(f)).
(d) Persons that will be permitted to enter the mine, the work these
persons will do while in the mine, and electric power circuits that will be
energized when a back-up fan system is used that does not provide the
ventilating quantity provided by the main mine fan (see
§75.311(c)).
(e) The locations and operating conditions of booster fans installed in
anthracite mines (see §75.302).
(f) Section and face ventilation systems used, including drawings
illustrating how each system is used, and a description of each different
dust suppression system used on equipment on working sections.
(g) Locations where the air quantities must be greater than 3,000 cubic
feet per minute (see
(h) In anthracite mines, locations where the air quantities must be
greater than 1,500 cubic feet per minute (see §75.325(e)(1)).
(i) Working places and working faces other than those where coal is being
cut, mined, drilled for blasting or loaded, where a minimum air quantity will
be maintained, and the air quantity at those locations (see
§75.325(a)(1)).
(j) The operating volume of machine mounted dust collectors or diffuser
fans, if used (see §75.325(a)(3)).
(k) The minimum mean entry air velocity in exhausting face ventilation
systems where coal is being cut, mined, drilled for blasting, or loaded, if
the velocity will be less than 60 feet per minute. Other working places
where coal is not being cut, mined, drilled for blasting or loaded, where at
least 60 feet per minute or some other minimum mean entry air velocity will
be maintained (see §75.326).
(l) The maximum distance if greater than 10 feet from each working face
at which face ventilation control devices will be installed (see
§75.330(b)(2)). The working places other
than those where coal is being cut, mined, drilled for blasting or loaded,
where face ventilation control devices will be used (see
§75.330(b)(1)(ii).
(m) The volume of air required in the last open crosscut or the quantity
of air reaching the pillar line if greater than 9,000 cubic feet per minute
(see §75.325(b)).
(n) In anthracite mines, the volume of air required in the last open
crosscut or the quantity of air reaching the pillar line if greater than
5,000 cubic feet per minute (see §75.325(e)(2)).
(o) Locations where separations of intake and return air courses will be
built and maintained to other than the third connecting crosscut outby each
working face (see §75.333(b)(1)).
(p) The volume of air required at the intake to the longwall sections, if
different than 30,000 cubic feet per minute (see §75.325(c)).
(q) The velocities of air on a longwall or shortwall face, and the
locations where the velocities must be measured (see
§75.325(c)(2)).
(r) The minimum quantity of air that will be provided during the
installation and removal of mechanized mining equipment, the location
where this quantity will be provided, and the ventilation controls that
will be used (see § 75.325(d), (g), and (i)).
(s) The locations and frequency of the methane tests if required more
often by §75.362(d)(1)(iii) (see
§75.362(d)(1)(iii).
(t) The locations where samples for "designated areas" will be collected,
including the specific location of each sampling device, and the respirable
dust control measures used at the dust generating sources for these locations
(see §70.208 of this chapter).
(u) The methane and dust control systems at underground dumps, crushers,
transfer points, and haulageways.
(v) Areas in trolley haulage entries where the air velocity will be
greater than 250 feet per minute and the velocity in these areas (see
§75.327(b)).
(w) Locations where entries will be advanced less than 20 feet from the
inby rib without a crosscut being provided where a line brattice will be
required. (see §75.333(g)).
(x) A description of the bleeder system to be used, including its design
(see §75.334).
(y) The means for determining the effectiveness of bleeder systems (see
§75.334(c)(2)).
(z) The locations where measurements of methane and oxygen concentrations
and air quantities and tests to determine whether the air is moving in the
proper direction will be made to evaluate the ventilation of nonpillared
worked-out areas (see §75.364(a)(1)) and
the effectiveness of bleeder systems (see §75.364(a)(2)(iii). Alternative methods of evaluation of the
effectiveness of bleeder systems (§75.364(a)(2)(iv)).
(aa) The means for adequately maintaining bleeder entries free of
obstructions such as roof falls and standing water (see
§75.334(c)(3)).
(bb) The location of ventilation devices such as regulators, stoppings
and bleeder connectors used to control air movement through worked-out areas
(see §75.334(c)(4)). The location and
sequence of construction of proposed seals for each worked-out area. (see
§75.334(e)).
(cc) In mines with a demonstrated history of spontaneous combustion: a
description of the measures that will be used to detect methane, carbon
monoxide, and oxygen concentration during and after pillar recovery and in
worked-out areas where no pillars have been recovered (see
§75.334(f)(1); and, the actions which will
be taken to protect miners from the hazards associated with spontaneous
combustion (see §75.334(f)(2). If a bleeder
system will not be used, the methods that will be used to control spontaneous
combustion, accumulations of methane-air mixtures, and other gases, dusts,
and fumes in the worked-out area (see §75.334(f)(3)).
(dd) The location of all horizontal degasification holes that are longer
than 1,000 feet and the location of all vertical degasification holes.
(ee) If methane drainage systems are used, a detailed sketch of each
system, including a description of safety precautions used with the
systems.
(ff) Seal installation requirements provided by § 75.335 and
the sampling provisions provided by § 75.336.
(gg) The alternative location for the additional sensing device if the
device will not be installed on the longwall shearing machine (see
§75.342(a)(2)).
(hh) The ambient level in parts per million of carbon monoxide, and the
method for determining the ambient level, in all areas where carbon monoxide
sensors are installed.
(ii) The locations (designated areas) where dust measurements would
be made in the belt entry when belt air is used to ventilate working
sections or areas where mechanized mining equipment is being installed
or removed, in accordance with § 75.350(b)(3).
(jj) The locations where velocities in the belt entry exceed limits
set forth in § 75.350(a)(2), and the maximum approved velocity for
each location.
(kk) The locations where air quantities are measured as set forth
in § 75.350(b)(6).
(ll) The locations and use of point-feed regulators, in accordance
with § § 75.350(c) and 75.350(d)(5).
(mm) The location of any additional carbon monoxide or smoke sensor
installed in the belt air course, in accordance with §
75.351(e)(5).
(nn) The length of the time delay or any other method used to
reduce the number of non-fire related alert and alarm signals from
carbon monoxide sensors, in accordance with § 75.351 75.351(m).
(oo) The reduced alert and alarm settings for carbon monoxide
sensors, in accordance with § 75.351(i)(2).
(pp) The alternate detector and the alert and alarm levels
associated with the detector, in accordance with § 75.352(e)(7).
(qq) The distance that separation between the primary escapeway and the
belt or track haulage entries will be maintained if other than to the first
connecting crosscut outby the section loading point (see
§75.380(g)).
(rr) In anthracite mines, the dimensions of escapeways where the pitch of
the coal seam does not permit escapeways to be maintained 4 feet by 5 feet
and the locations where these dimensions must be maintained (see
§75.381(c)(4)).
(ss) Areas designated by the district manager where measurements of
CO and NO2 concentrations will be made (see § 70.1900(a)(4)).
(tt) Location where the air quantity will be maintained at the
section loading point (see § 75.325(f)(2)).
(uu) Any additional location(s) required by the district manager
where a minimum air quantity must be maintained for an individual unit
of diesel-powered equipment. (see § 75.325(f)(5)).
(vv) The minimum air quantities that will be provided where
multiple units of diesel-powered equipment are operated (see
§ 75.325(g) (1)-(3) and (i)).
(ww) The diesel-powered mining equipment excluded from the
calculation under § 75.325(g). (see § 75.325(h)).
(xx) Action levels higher than the 50 percent level specified by
§ 70.1900(c). (see § 75.325(j)).
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