Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart D - Ventilation › Section 75.371 - Mine ventilation plan; contents

Current through July 13, 2024
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 75.325(a)(1)).
(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) 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
				  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 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 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)).
(jj) 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)).
(kk) Areas designated by the district manager
				  where measurements of CO and NO2 concentrations will be
				  made (see Sec. 70.1900(a)(4)).
(ll) Location where the air quantity will
				  maintained at the section loading point (see Sec. 75.325(f)(2)).
(mm) 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)).
(nn) 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)).
(oo)
				  The diesel-powered mining equipment excluded from the calculation under Sec.
				  75.325(g) (see Sec. 75.325(h)).
(pp) Action levels higher than the 50 percent
				  level specified by Sec 70.1900(c) (see Sec 75.325(j).