[Code of Federal Regulations]
[Title 30, Volume 1]
[Revised as of July 1, 2006]
From the U.S. Government Printing Office via GPO Access
[CITE: 30CFR75.371]
[Page 506-509]
TITLE 30--MINERAL RESOURCES
CHAPTER I--MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR
PART 75_MANDATORY SAFETY STANDARDS_UNDERGROUND COAL MINES--Table of
Contents
Subpart D_Ventilation
Sec. 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 Sec. 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 Sec.
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 Sec. 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 Sec.
75.311(c)).
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(e) The locations and operating conditions of booster fans installed
in anthracite mines (see Sec. 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 Sec. 75.325(a)(1)).
(h) In anthracite mines, locations where the air quantities must be
greater than 1,500 cubic feet per minute (see Sec. 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 Sec. 75.325(a)(1)).
(j) The operating volume of machine mounted dust collectors or
diffuser fans, if used (see Sec. 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 Sec. 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
Sec. 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 Sec. 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 Sec. 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 Sec. 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 Sec. 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 Sec.
75.325(c)).
(q) The velocities of air on a longwall or shortwall face, and the
locations where the velocities must be measured (see Sec.
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 Sec. 75.325(d), (g), and (i)).
(s) The locations and frequency of the methane tests if required
more often by Sec. 75.362(d)(1)(iii) (see Sec. 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 Sec. 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
Sec. 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 Sec. 75.333(g)).
(x) A description of the bleeder system to be used, including its
design (see Sec. 75.334).
(y) The means for determining the effectiveness of bleeder systems
(see Sec. 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 Sec. 75.364 (a)(1))
and the effectiveness of bleeder systems (see Sec. 75.364 (a)(2)(iii).
Alternative methods of evaluation of the effectiveness of bleeder
systems (Sec. 75.364 (a)(2)(iv)).
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(aa) The means for adequately maintaining bleeder entries free of
obstructions such as roof falls and standing water (see Sec.
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 Sec. 75.334(c)(4)). The location and sequence of
construction of proposed seals for each worked-out area. (see Sec.
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 Sec. 75.334(f)(1); and, the actions which will be taken to protect
miners from the hazards associated with spontaneous combustion (see
Sec. 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 Sec. 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) A description of the methods and materials to be used to seal
worked-out areas if those methods or materials will be different from
those specified by Sec. 75.335(a)(1).
(gg) The alternative location for the additional sensing device if
the device will not be installed on the longwall shearing machine (see
Sec. 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 Sec. 75.350(b)(3).
(jj) The locations where velocities in the belt entry exceed limits
set forth in Sec. 75.350(a)(2), and the maximum approved velocity for
each location.
(kk) The locations where air quantities are measured as set forth in
Sec. 75.350(b)(6).
(ll) The locations and use of point-feed regulators, in accordance
with Sec. Sec. 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 Sec. 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 Sec. 75.351(m).
(oo) The reduced alert and alarm settings for carbon monoxide
sensors, in accordance with Sec. 75.351(i)(2).
(pp) The alternate detector and the alert and alarm levels
associated with the detector, in accordance with Sec. 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 Sec.
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 Sec. 75.381(c)(4)).
(ss) Areas designated by the district manager where measurements of
CO and NO2 concentrations will be made (see Sec.
70.1900(a)(4)).
(tt) Location where the air quantity will be maintained at the
section loading point (see Sec. 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 Sec. 75.325(f)(5)).
(vv) The minimum air quantities that will be provided where multiple
units of diesel-powered equipment are operated (see Sec. 75.325(g) (1)-
(3) and (i)).
(ww) The diesel-powered mining equipment excluded from the
calculation under Sec. 75.325(g). (see Sec. 75.325(h)).
[[Page 509]]
(xx) Action levels higher than the 50 percent level specified by
Sec. 70.1900(c). (see Sec. 75.325(j)).
[61 FR 9829, Mar. 11, 1996, as amended at 61 FR 55527, Oct. 25, 1996; 69
FR 17529, Apr. 2, 2004]