57.19103 Dumping facilities and loading pockets. 57.16017 Hoisting heavy equipment or material. (1) When the operator has an obstructed view to the rear, self-propelled mobile equipment shall have. ROPS shall meet the requirements of the following Society of Automotive Engineers (SAE) publications, as applicable, which are incorporated by reference: (1) SAE J1040, Performance Criteria for Roll-Over Protective Structures (ROPS) for Construction, Earthmoving, Forestry, and Mining Machines,, 1986; or. As a Tests for methane shall be made at electric auxiliary fans before they are started. General RequirementsSurface and Underground. This bar shall be of a length and design that will allow the removal of loose material without exposing the person performing the work to injury. (b) When blasting sulfide ores where hot holes occur that may react with explosive material in blastholes, operators shall. (2) Where uranium is not minedthe complete individual exposure of all mine personnel working in active working areas with radon daughter concentrations in excess of 0.3 WL shall be calculated and recorded. (d) Covered on all combustible interior and exterior structural surfaces with noncombustible material or limited combustible material, such as five-eighth inch, type X gypsum wallboard. 57.12066 Guarding trolley wires and bare powerlines. (c) Emergency hoisting facilities should conform to the extent possible to safety requirements for other hoists, and should be adequate to remove the persons from the mine with a minimum of delay. (i) Constructed so that, once closed, it will not reopen as a result of a differential in air pressure; (ii) Constructed so that it can be opened from either side by one person or be provided with a personnel door that can be opened from either side; (iv) Provided with a means of remote or automatic closure unless a person specifically designated to close the door in the event of a fire can reach the door within three minutes. Overburden means material of any nature, consolidated or unconsolidated, that overlies a deposit of useful materials or ores that are to be mined. (3) Where a mine has been classified in Categories I through V after the effective date of these standards and category reassignment is being considered, the mine shall comply with the standards applicable to the category to which presently assigned until category placement is final. This document is available for inspection at each Metal and Nonmetal Mine Safety and Health District Office of the Mine Safety and Health Administration, and may be obtained from the U.S. Government Printing Office, Washington, DC 20402. The 50-foot (15.2-meter) and alternative 30-foot (9.1-meter) requirements also apply in all directions along the full depth of the hole. (c) A person shall attend the belt at the drive pulley when it is necessary to operate the conveyor while temporarily bypassing the automatic function. A means shall be provided to guide the movement of a shaft conveyance. Such apparatus shall be approved by MSHA and NIOSH under 42 CFR part 84 and shall be maintained in accordance with manufacturers' specifications. Overload means that current which will cause an excessive or dangerous temperature in the conductor or conductor insulation. 57.19013 Diesel- and other fuel-injection-powered hoists. Safety Devices and Maintenance Requirements. (4) Opened only when the powder is being transferred to a blasthole or another container and only in locations not listed in paragraph (b)(3) of this section. Switches shall be locked out or other measures taken which shall prevent the power circuits from being energized without the knowledge of the individuals working on them. Suitable clearance at shaft stations shall be provided to allow safe movement of persons, equipment and materials. will also bring you to search results. Travelways steeper than 35 degrees from the horizontal shall be provided with ladders or stairways. 552(a) and 1 CFR part 51. Mine opening means any opening or entrance from the surface into a mine. Open flames (I-A, II-A, III, and V-A mines). Auxiliary fans shall not be used to ventilate work places during the interruption of normal mine ventilation. A passage, walk, or way regularly used or designated for persons to go from one place to another. Control of employee exposure to harmful airborne contaminants shall be, insofar as feasible, by prevention of contamination, removal by exhaust ventilation, or by dilution with uncontaminated air. The mine operator may request that the required exhaust mine air sampling be done by the Mine Safety and Health Administration. (d) Automatic fire suppression system and escape route. 57.18009 Designation of person in charge. (1) Within twenty four hours report to the nearest MSHA office each rock burst which: (iv) Disrupts mining activity for more than one hour. All seals, and those stoppings that separate main intake from main return airways, shall be of substantial construction and constructed of noncombustible materials, except that stoppings constructed of brattice materials may be used in face areas. 57.11016 Snow and ice on walkways and travelways. (a) Primers shall be made up only at the time of use and as close to the blast site as conditions allow. eCFR :: 30 CFR Part 57 -- Safety and Health Standards - eCFR :: Home (2) Where uranium is not minedno further exhaust mine air sampling is required. Arrangements shall be made in advance for obtaining emergency medical assistance and transportation for injured persons. All mines shall be ventilated mechanically. (2) Where a mine has not been classified as gassy prior to the effective date of these standards and it is placed in Categories I through V, the mine shall comply with Category VI standards ( 57.22231, 57.22232, 57.22236, and 57.22238) until placement is final. PDF Federal MSHA Regulations (30 CFR 75 - Department of Environmental 57.9260 Supplies, materials, and tools on mantrips. Electrical distribution circuits within 50 feet of electric detonators at the blast site shall be deenergized. (ii) If the equipment exceeds the maximum stopping distance in the initial test run, the mine operator may request from the inspector up to four additional test runs with two runs to be conducted in each direction. 57.4530 Exits for surface buildings and structures. Continuity and resistance of grounding systems shall be tested immediately after installation, repair, and modification; and annually thereafter. [This interim permissible exposure limit (PEL) remains in effect until the final DPM exposure limit becomes effective. Certifications and records of examinations shall be retained for one year. The roadway shall be wide enough to accommodate the size of the equipment being tested. The constant speed shall be maintained up to the point when the equipment operator receives the signal to apply the brakes. (4) If located less than 20 feet from exposed timber or other combustibles, the control door or bulkhead shall provide protection at least equivalent to a door constructed of two layers of wood, each a minimum of three-quarters of an inch in thickness. [53 FR 32528, Aug. 25, 1988, as amended at 67 FR 38385, June 4, 2002; 68 FR 19347, Apr. This provision does not apply to rail equipment. Any substance classified as a blasting agent by the Department of Transportation in 49 CFR 173.114a(a). Storage of combustible liquids underground. (a) Methane monitors shall be installed on continuous mining machines, longwall mining systems, bench and face drills, and undercutting machines used in or beyond the last open crosscut. However, where persons may be endangered by hoists and appurtenances used solely for handling ore, rock, and materials, the appropriate standards should be applied. Where creep or slip may alter the effective position of safety devices, friction hoists shall be equipped with synchronizing mechanisms that recalibrate the overtravel devices and position indicators. The standards in this subpart apply to underground mines as well as surface mills at Subcategory I-C mines. Operators of self-propelled mobile equipment shall maintain control of the equipment while it is in motion. 57.15007 Protective equipment or clothing for welding, cutting, or working with molten metal. A statement of reasons for the action taken shall be included in the final decision. 57.22240 Actions at 2.0 percent methane (V-A mines). (2) Equipped with supply and discharge operating controls. (d) Fuse shall be cut and capped in dry locations. 57.12026 Grounding transformer and switchgear enclosures. (2) Where the hoist rope rests on sheaves at regular stopping points; (3) Where the hoist rope leaves the drum at regular stopping points; and. Warnings prior to starting or moving equipment. Shaft landings shall be equipped with substantial safety gates so constructed that materials will not go through or under them; gates shall be closed except when loading or unloading shaft conveyances. The miner must be transferred within 30 days of the final determination by the PLHCP. Lay means the distance parallel to the axis of the rope in which a strand makes one complete turn about the axis of the rope. (b) The Secretary will collect samples of DPM by using a respirable dust sampler equipped with a submicrometer impactor and analyze the samples for the amount of elemental carbon using the method described in NIOSH Analytical Method 5040, except that the Secretary also may use any methods of collection and analysis subsequently determined by NIOSH to provide equal or improved accuracy for the measurement of DPM. (c) Exposed surfaces on the fresh air side of seals constructed of combustible materials shall be coated with at least one inch of construction plaster containing perlite and gypsum; at least one inch of expanded vermiculite, Portland cement and limestone; or other coatings with equivalent fire resistance. 57.22203 Main fan operation (I-C mines). 57.19073 Hoisting during shift changes. A miner's personal exposure to asbestos shall not exceed an 8-hour time-weighted average full-shift airborne concentration of 0.1 fiber per cubic centimeter of air (f/cc). (g) When grouted fixtures can be tested by applying torque, the first fixture installed in each work place shall be tested to withstand 150 foot-pounds of torque. NFPA No. 22, 1998]. (c) If the monitoring system indicates the presence of 1.0 percent or more methane, persons other than examiners shall not enter the mine until the mine has been examined by a competent person and the methane level is less than 1.0 percent. (1) Are positioned to prevent persons from falling on or against the conveyor; (2) Will be able to withstand the vibration, shock, and wear to which they will be subjected during normal operation; and. (a) Detonators shall not be stored in the same magazine with other explosive material. All metal pipelines, 1,000 feet or more in length running parallel to trolley tracks, that are used as a ground return circuit shall be bonded to the return circuit rail at the ends of the pipeline and at intervals not to exceed 500 feet. [50 FR 4082, Jan. 29, 1985, as amended at 60 FR 30400, June 8, 1995; 60 FR 33723, June 29, 1995; 60 FR 35695, July 11, 1995; 71 FR 16667, Apr. NFPA No. Such devices shall be maintained in accordance with manufacturers' instructions, or an equivalent maintenance and calibration procedure. (a) Surface storage buildings or storage rooms in which flammable or combustible liquids, including grease, are stored and that are within 100 feet of any person's work station shall be ventilated with a sufficient volume of air to prevent the accumulation of flammable vapors. (e) Between cars of trains, on the leading end of trains, on the leading end of a single railcar, or in other locations on trains that expose persons to hazards from train movement. However, where accepted engineering control measures have not been developed or when necessary by the nature of work involved (for example, while establishing controls or occasional entry into hazardous atmospheres to perform maintenance or investigation), employees may work for reasonable periods of time in concentrations of airborne contaminants exceeding permissible levels if they are protected by appropriate respiratory protective equipment. Please do not provide confidential (2) The mine operator must retain for five years (from the date of sampling), the results of any samples the operator collected as a result of monitoring under this section, and information about the sampling method used for obtaining the samples. 57.22227 Approved testing devices (I-A, I-B, I-C, II-A, II-B, III, IV, V-A, and V-B mines). (1) All persons other than competent persons necessary to make the ventilation changes shall be withdrawn from affected areas; (2) Electrical power shall be deenergized in affected areas, except power to monitoring equipment determined by MSHA to be intrinsically safe under 30 CFR part 18; and. The small quantities shall be stored in safety cans or in non-glass containers of a capacity equal to or less than a safety can. ROPS shall be installed on the equipment in accordance with the recommendations of the ROPS manufacturer. If you have questions or comments regarding a published document please (a) If a hazard to persons could be created, no combustible materials shall be stored or allowed to accumulate within 25 feet of the following: (2) Unburied, flammable or combustible liquid storage tanks. Every person underground shall carry a positive means of being identified. Travel is permitted when necessary for persons to dismount. (a) Open flames, including cutting and welding, shall not be used underground. (c) Any place where the train operator's vision is obscured. Secondary blasting (I-A, II-A, and V-A mines). [51 FR 36198, Oct. 8, 1986, as amended at 60 FR 33723, June 29, 1995; 60 FR 35695, July 11, 1995; 71 FR 16667, Apr. (c) Atmospheric monitoring systems shall be checked with a known mixture of methane, and calibrated if necessary at least once every 30 days. [52 FR 24941, July 1, 1987; 52 FR 27903, July 24, 1987]. The door shall provide protection at least equivalent to a door constructed of two layers of wood, each a minimum of three-quarters of an inch in thickness. 57.9330 Clearance for surface equipment. Operating speeds shall be consistent with conditions of roadways, tracks, grades, clearance, visibility, and traffic, and the type of equipment used. 1291 (30 U.S.C. (a) Reciprocating-type air compressors rated over 10 horsepower shall be equipped with automatic temperature-actuated shutoff mechanisms which shall be set or adjusted to the compressor when the normal operating temperature is exceeded by more than 25 percent. High-potential electrical conductors shall be covered, insulated, or placed to prevent contact with low potential conductors. (e) Misfires shall be disposed of by washing the stemming and powder charge from the blasthole, and removing and disposing of the initiator in accordance with the requirement for damaged explosives. (3) Are constructed and maintained so that they will not create a hazard. Inspection and maintenance of carriers (including loading and unloading mechanisms), ropes and supports, and brakes shall be performed by competent persons according to the recommendations of the manufacturer.
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