(b) If a total failure of ventilation occurs while all persons are out of the mine and the failure lasts for more than 30 minutes, only competent persons shall be allowed underground to examine the mine or to make necessary ventilation changes. Gas samples taken to determine the nature and extent of an occurrence under 57.22004 (c) and (d) may be taken at any location, including the source, point of entry and the mine atmosphere. Valves on compressed gas cylinders shall be protected by covers when being transported or stored, and by a safe location when the cylinders are in use. 57.22101 Smoking (I-A, II-A, III, and V-A mines). (3) Are constructed and maintained so that they will not create a hazard. [51 FR 36198, Oct. 8, 1986, as amended at 69 FR 38842, June 29, 2004]. NFPA No. [70 FR 32966, June 6, 2005; 70 FR 37901, June 30, 2005; 71 FR 29012, May 18, 2006]. Diesel equipment shall be shut off or immediately removed from the area and no other work shall be permitted in affected areas. 57.22217 Seals and stoppings (I-A, I-B, and I-C mines). Telephone: 3019756478 (not a toll free number); http://ts.nist.gov/nvl; or from the Government Printing Office, Information Dissemination (Superintendent of Documents), P.O. Surface electric substations and liquid storage facilities. (e) This standard applies only to mines blasting within an oil reservoir. Operator-carrying overhead cranes shall be provided with. (2) Kept in a totally enclosed cargo space while being transported by a vehicle; (i) Within 50 feet of any magazine or open flame; (ii) Within any building in which a fuel-fired or exposed-element electric heater is operating; or, (iii) In an area where electrical or incandescent-particle sparks could result in powder ignition; and. Smoking shall be prohibited in all areas of a mine where exposure records are required to be kept in compliance with standard 57.5040. Riding hoisted loads or on the hoist hook. Fixed ladders shall project at least 3 feet above landings, or substantial handholds shall be provided above the landings. (2) The escape route shall bypass the shop area so that the route will not be affected by a fire in the shop area. As a (b) When blasting sulfide ores where hot holes occur that may react with explosive material in blastholes, operators shall. The control handle shall be clearly labeled to indicate that its intended function is for emergency stopping only. (1) Gas samples for the purpose of category or subcategory placement or change in placement, and for determining action levels, shall be taken in the mine atmosphere. Muck shall not be hoisted with personnel during shift changes. Slurry (as applied to blasting). 57.19076 Maximum speeds for hoisting persons in buckets. (j) Publications. Unguarded conveyors with adjacent travelways. ROPS shall be installed on the equipment in accordance with the recommendations of the ROPS manufacturer. (i) Seat belt maintenance. 57.22201 Mechanical ventilation (I-A, I-B, I-C, II-A, II-B, III, IV, V-A, and V-B mines). Inclined railed walkways shall be nonskid or provided with cleats. (a) The burning rate of each spool of safety fuse to be used shall be measured, posted in locations which will be conspicuous to safety fuse users, and brought to the attention of all persons involved with the blasting operation. Rollers used in operating inclined shafts shall be lubricated, properly aligned, and kept in good repair. 57.22228 Preshift examination (I-A, I-C, II-A, III, and V-A mines). (c) Vehicles used for dispensing bulk explosive material shall, (1) Have no zinc or copper exposed in the cargo space; and. Powerlines shall be well separated or insulated from waterlines, telephone lines and air lines. 57.6400 Compatibility of electric detonators. (a) Taglines shall be attached to loads that may require steadying or guidance while suspended. (ii) The approach shall be of sufficient length to allow the equipment operator to reach and maintain a constant speed between 10 and 20 miles per hour prior to entering the 100 foot measured area. [52 FR 24941, July 1, 1987; 52 FR 27903, July 24, 1987, as amended at 67 FR 38385, June 4, 2002; 80 FR 52988, Sept. 2, 2015]. (a) The hoisting standards in this subpart apply to those hoists and appurtenances used for hoisting persons. Appropriate portions of such maps or diagrams shall be posted at all shaft stations and in underground shops, lunchrooms, and elsewhere in working areas where persons congregate; (b) Procedures to show how the miners will be notified of emergency; (c) An escape plan for each working area in the mine to include instructions showing how each working area should be evacuated. Detonators shall not be transported on the same vehicle or conveyance with other explosives except as follows: (a) Detonators in quantities of more than 1,000 may be transported in a vehicle or conveyance with explosives or blasting agents provided the detonators are, (1) Maintained in the original packaging as shipped from the manufacturer; and. (a) Areas within 25 feet of the following shall be free of combustible materials: (2) Unburied, combustible liquid storage tanks. [53 FR 32528, Aug. 25, 1988, as amended at 67 FR 38385, June 4, 2002; 68 FR 19347, Apr. (a) Except as provided in paragraph (b) and (c) of this section, self-rescue devices meeting the requirements of standard 57.15030 shall be worn or carried by all persons underground. Guard nets or other suitable protection shall be provided where tramways pass over roadways, walkways, or buildings. 57.4100 Smoking and use of open flames. (3) Take other special precautions to address the specific conditions at the mine to prevent premature detonation. Telephone and low-potential signal wire shall be protected, by isolation or suitable insulation, or both, from contacting energized power conductors or any other power source. (a) At least once every fourteen calendar days, each wire rope in service shall be visually examined along its entire active length for visible structural damage, corrosion, and improper lubrication or dressing. Scaling shall be performed from a location which will not expose persons to injury from falling material, or other protection from falling material shall be provided. (a) The table entitled Diesel Particulate Matter Recordkeeping Requirements lists the records the operator must maintain pursuant to 57.5060 through 57.5071, and the duration for which particular records need to be retained. (c) Every floor, working place, and passageway shall be kept free from protruding nails, splinters, holes, or loose boards, as practicable. The ends of such conduit or pipe shall be sealed to prevent entry of explosive gas or dust. Tamping and loading poles shall be of wood or other nonconductive, nonsparking material. Hoist controls shall be placed or housed so that the noise from machinery or other sources will not prevent hoistmen from hearing signals. When the Service Brakes Are Applied at the End of the Course, Stopping Distance Can Be Measured and Compared to Table M1. (b) Main facilities used to store explosive material underground shall be. During shift changes, the movement of underground trains carrying rock or material shall be limited to areas where the trains do not present a hazard to persons changing shifts. (a) Persons shall not work on top of, under, or work from mobile equipment in a raised position until the equipment has been blocked or mechanically secured to prevent it from rolling or falling accidentally. [66 FR 5907, Jan. 19, 2001, as amended at 67 FR 9184, Feb. 27, 2002]. The self-contained breathing system shall provide a minimum of 24 hours of respirable atmosphere to the hoist operator. (2) If air samples are delivered to remote analytical devices through sampling tubes, such tubes shall be provided with in-line flame arrestors. High-potential electrical conductors shall be covered, insulated, or placed to prevent contact with low potential conductors. Transformer stations shall be enclosed to prevent persons from unintentionally or inadvertently contacting energized parts. 57.9316 Notifying the equipment operator. (3) Errors detected by the operator shall be corrected on any forms kept by the operator and a corrected copy of any forms submitted to the Mine Safety and Health Administration shall be submitted to the Mine Safety and Health Administration within 60 days of detection and shall identify the errors and indicate the date the corrections are made. (b) Waste or rags containing flammable or combustible liquids that could create a fire hazard shall be placed in the following containers until disposed of properly: (1) Undergroundcovered metal containers. (c) The Secretary will use full-shift personal sampling for compliance determinations. (a) Any hoist or shaft repairs or related equipment repairs that might restrict or obstruct conveyance clearance; (b) Any oversize or overweight material or equipment trips that might restrict or obstruct conveyance clearance; (c) Blasting in or near the shaft that might restrict or obstruct conveyance clearance; or. (ii) No greater than the yield point of the bolt or anchorage capacity of the rock. The employer must provide each operator-in-training with sufficient training, through a combination of formal and practical instruction, to ensure that the operatorin- training develops the skills, knowledge, and ability to recognize and avert risk necessary to operate the equipment safely for assigned work. For tests to be considered valid, the equipment shall not slide sideways or exhibit other lateral motion during the braking portion of the test. 57.4531 Surface flammable or combustible liquid storage buildings or rooms. (b) Mobile equipment, other than forklifts, carrying loads that project beyond the sides or more than four feet beyond the rear of the equipment shall have a warning flag at the end of the projection. Electric blasting circuits, including powerline sources when used, shall not be grounded. Requests for a hearing shall be in writing and contain the following information: (1) Name, address, and mine identification number; (2) A concise statement of the reason why the Administrator's determination is inappropriate; and. If tests prove positive, appropriate control measures shall be taken. Carbide lights, liquefied petroleum gas torches, and cigarette lighters shall not be used to light safety fuse. 57.6900 Damaged or deteriorated explosive material. Where necessary, toeboards shall be provided. Equipment shall not be tested when carrying hazardous loads, such as explosives. Wooden components of ladders shall not be painted except with a transparent finish. (a) Fired pressure vessels (boilers) shall be equipped with water level gauges, pressure gauges, automatic pressure-relief valves, blowdown piping, and other safety devices approved by the American Society of Mechanical Engineers to protect against hazards from overpressure, flameouts, fuel interruptions and low water level, all as required by the appropriate sections, chapters and appendices listed in paragraphs (b) (1) and (2) of this section. 57.22105 Smoking and open flames (IV mines). Title 30 was last amended 4/20/2023. (3) All access routes to the blast area shall be guarded or barricaded to prevent the passage of persons or vehicles. High potential means more than 650 volts. (d) A means to lock out the disconnect switch. Except as provided by standard 57.5005, persons shall not be exposed to air containing concentrations of radon daughters exceeding 1.0 WL in active workings. Copies may be purchased from the Society of Automotive Engineers, 400 Commonwealth Drive, Warrendale, PA 150960001; 7247764841; http://www.sae.org. A person designated by the mine operator who has sufficient experience and training to perform the assigned task. 1926.753 (c) (1) (iv) The operator shall be responsible for those operations under the operator's direct control. NFPA No. 57.13015 Inspection of compressed-air receivers and other unfired pressure vessels. (a) A competent person designated by the operator shall examine each working place at least once each shift before miners begin work in that place, for conditions that may adversely affect safety or health. (v) Testing speeds shall be a minimum of 10 miles per hour and a maximum of 20 miles per hour. 1291 (30 U.S.C. (b) In the event of main or booster fan failure due to a malfunction, accident, power failure, or other such unplanned or unscheduled event: (1) The air quality in the affected active workings shall be tested at least within 2-hours of the discovery of the fan failure, and at least every 4-hours thereafter by a competent person for compliance with the requirements of the applicable standards of subpart D of this part until normal ventilation is restored, or. (b) Persons attempting to free chute hangups shall be experienced and familiar with the task, know the hazards involved, and use the proper tools to free material. (1) Be accomplished by a main fan. Equipment used in or beyond the last open crosscut shall be approved by MSHA under the applicable requirements of 30 CFR parts 18 through 36. (1) Installed in a noncombustible housing; (2) Protected from a possible fuel supply fire or explosion; and. (2) On the surfacecovered metal containers or equivalent containers with flame containment characteristics. (5) Locations of air regulators and stoppings and ventilation doors not shown in paragraph (d) of this standard; (6) Locations of overcasts, undercasts and other airway crossover devices not shown in paragraph (d) of this standard; (8) Locations of known underground mine openings adjacent to the mine; (9) Locations of permanent underground shops, diesel fuel storage depots, oil fuel storage depots, hoist rooms, compressors, battery charging stations and explosive storage facilities.

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