(b) At least one of the following actions shall be taken: (1) Wet down the area before and after the operation, taking precaution against any hazard of electrical shock. However, only methane samples that have been confirmed by laboratory analysis shall be used for category or subcategory placement or change in placement. If concentrations of radon daughters are found in excess of 0.3 WL in an active working area radon daughter concentrations thereafter shall be determined at least weekly in that working area until such time as the weekly determinations in that area have been 0.3 WL or less for 5 consecutive weeks. 57.19068 Orderly conduct in conveyances. This publication may be examined at any Metal and Nonmetal Mine Safety and Health Subdistrict Office of the Mine Safety and Health Administration, or may be obtained from the American National Standards Institute, Inc., 25 W. 43rd Street, 4th Floor, New York, NY 10036; http://www.ansi.org. Stationary diesel equipment underground shall be, (a) Supported on a noncombustible base; and. Crossovers, elevated walkways, elevated ramps, and stairways shall be of substantial construction, provided with handrails, and maintained in good condition. Access to stationary electrical equipment or switchgear. The following chemical substances shall not be used or stored except by competent persons under laboratory conditions approved by a nationally recognized agency acceptable to the Secretary. Any person responsible for receiving or giving signals for cages, skips, and mantrips when persons or materials are being transported shall be familiar with the posted signaling code. Notice and appeal of placement or change in placement. Auxiliary equipment stations (I-C mines). Distribution boxes containing short circuit protection for trailing cables of approved equipment shall be approved by MSHA under 30 CFR part 18. The manufacturer or engineer shall certify that the ROPS meets the applicable performance requirements. 57.19074 Riding the bail, rim, bonnet, or crosshead. Conductive portions of nonmetal magazines shall be grounded. There may be times when special purpose foot protection, such as metatarsal protectors, is needed. (3) The operator must maintain any emission or particulate control device installed on the equipment in effective operating condition. All persons shall wear safety glasses, goggles, or face shields or other suitable protective devices when in or around an area of a mine or plant where a hazard exists which could cause injury to unprotected eyes. The record shall contain the name of the person conducting the examination; date of the examination; location of all areas examined; and description of each condition found that may adversely affect the safety or health of miners. Primer. Telephone or other voice communication shall be provided between the surface and refuge chambers and such systems shall be independent of the mine power supply. Machinery or equipment shall not be lubricated manually while it is in motion where application of the lubricant may expose persons to injury. Open flames shall not be permitted underground except for welding, cutting, and other maintenance operations, and for igniting underground retorts in a Subcategory I-A mine. Excursions above the listed thresholds shall not be of a greater magnitude than is characterized as permissible by the Conference. (c) A loss of more than one-third of the original diameter of the outer wires. Emergency medical assistance and transportation. (iii) The actions the operator will take during the extension to minimize exposure of miners to DPM. Protection for openings around travelways. Manual material handling (MMH) is the process of routinely moving and handling objects by carrying, holding, lifting, pulling, pushing, and stooping. (4) Test results shall be evaluated as follows: (i) If the initial test run is valid and the stopping distance does not exceed the corresponding stopping distance listed in Table 1, the performance of the service brakes shall be considered acceptable. Until corrective work is completed, the area shall be posted with a warning against entry and, when left unattended, a barrier shall be installed to impede unauthorized entry. A fuse that burns progressively along its length with an external flame at the zone of burning, used for lighting a series of safety fuses in a desired sequence. Persons shall not enter or leave conveyances which are in motion or after a signal to move the conveyance has been given to the hoistman. (a) Toilet facilities shall be provided at locations that are compatible with the mine operations and that are readily accessible to mine personnel. (4) Separated from explosives or blasting agents, shaft stations, and ignition sources including electric equipment that could create sufficient heat or sparks to pose a fire hazard. Title 30 was last amended 4/20/2023. ROPS shall have a label permanently affixed to the structure identifying. (1) The materials being hoisted must be rigged to prevent unintentional displacement. Individual overload protection or short circuit protection shall be provided for the trailing cables of mobile equipment. We recommend you directly contact the agency responsible for the content in question. The containers shall be kept away from any heat source and the hoist operator's work station. If extraneous electricity is suspected in an area where electric detonators are used, loading shall be suspended until tests determine that stray current does not exceed 0.05 amperes through a 1-ohm resister when measured at the location of the electric detonators. Only a decision by the Assistant Secretary shall be considered final Agency action for purposes of judicial review. (b) The mine operator must provide affected miners and their representatives with an opportunity to observe exposure monitoring required by this section. Where such trolley wires and bare power conductors are less than 7 feet above the rail, they shall be guarded at all points where persons work or pass regularly beneath. Cage doors or gates shall be closed while persons are being hoisted; they shall not be opened until the cage has come to a stop. 57.22307 Methane monitors (II-A mines). 57.19008 Friction hoist synchronizing mechanisms. (b) In the event of auxiliary fan failure due to 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. The operating mechanism of the clutch of every man-hoist drum shall be provided with a locking mechanism, or interlocked electrically or mechanically with the brake to prevent accidental withdrawal of the clutch. Ladders shall be of substantial construction and maintained in good condition. will also bring you to search results. Where grooved drums are used, the grooves shall be of suitable size and pitch for the ropes used. Electrical conductors shall be of a sufficient size and current-carrying capacity to ensure that a rise in temperature resulting from normal operations will not damage the insulating materials. The controls shall be located so that spills or overruns will not endanger persons. Static electricity dissipation during loading. (d) Buckets equipped with positive locks to prevent accidental tripping or dumping. [61 FR 36801, July 12, 1996, as amended at 67 FR 38385, June 4, 2002; 80 FR 52988, Sept. 2, 2015], (a) Main facilities used to store explosive material underground shall be located. If guide ropes are used in shafts for personnel hoisting applications other than shaft development, the nominal strength (manufacturer's published catalog strength) of the guide rope at installation shall meet the minimum value calculated as follows: Minimum value = Static Load 5.0. (7) At least 25 feet from detonator storage facilities. (d) The operator shall maintain the examination records for at least one year, make the records available for inspection by authorized representatives of the Secretary and the representatives of miners, and provide these representatives a copy on request. 57.3201 Location for performing scaling. An application must include the following information: (i) Documentation supporting that controls are technologically or economically infeasible at this time to reduce the miner's exposure to the final DPM limit. In addition, visual examination for wear and broken wires shall be made at stress points, including the area near attachments, where the rope rests on sheaves, where the rope leaves the drum, at drum crossovers, and at change-of-layer regions. 57.22103 Open flames (I-A, II-A, III, and V-A mines). 57.6302 Separation of explosive material. (1) Offset so that the fan and its associated components are not in direct line with possible explosive forces; (2) Equipped with explosion-doors, a weak-wall, or other equivalent devices located to relieve the pressure that would be created by an explosion underground. (d) ROPS installation. Damaged or deteriorated wire rope shall be removed by cutoff and the rope reterminated where there is. The equipment must also be blocked or secured to prevent rolling. (b) Storage tanks shall be vented or otherwise constructed to prevent development of pressure or vacuum as a result of filling, emptying, or atmospheric temperature changes. (d) Automatic fire suppression system and escape route. Permanent blasting lines shall be properly supported. 1 year after date any equipment is tagged. While the request for category or subcategory reassignment is pending, the mine shall continue to operate under the standards for the category or subcategory to which originally assigned. When persons are hoisted, the signaling devices shall be attended until the crosshead has been engaged. These investigations may include an evaluation of the following: (1) Source, nature, and extent of occurrences; (2) Conditions under which the incident occurred; (4) Physical conditions at the time of the occurrence; (5) Charts, logs, and records related to the occurrence; (6) Whether the occurrence is isolated, continuous, or could recur; (7) Conditions indicating that the hazards of methane no longer exist or exist under circumstances more appropriately governed by a different category or subcategory; (8) The geology of the mine and the geological area in which the mine is located; and. Openings above, below, or near travelways through which persons or materials may fall shall be protected by railings, barriers, or covers. (a) When moving mobile equipment between workplaces, booms, forks, buckets, beds, and similar movable parts of the equipment shall be positioned in the travel mode and, if required for safe travel, mechanically secured. [53 FR 32526, Aug. 25, 1988, as amended at 60 FR 35695, July 11, 1995; 71 FR 16667, Apr. 57.19003 Driving mechanism connections. A standard code of hoisting signals shall be adopted and used at each mine. (c) The mine operator shall post a copy of the Administrator's determination and the request for a hearing on the mine bulletin board, and shall maintain the posting until the placement becomes final. Certifications of tests shall be retained for at least one year and made available to authorized representatives of the Secretary. (b) Exposed surfaces on the intake side of stoppings constructed of combustible materials or foam-type blocks 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. Subscribe to: Changes in Title 30 :: Chapter I :: Subchapter K :: Part 57. When a locomotive on one track is used to move rail equipment on adjacent tracks, a chain, cable, or drawbar shall be used which is capable of withstanding the loads to which it could be subjected. 57.19065 Lowering conveyances by the brakes. 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. 57.22315 Self-contained breathing apparatus (V-A mines). (e) Except in Subcategory I-C or Category III mines, vehicles used for transportation when examining the mine shall be approved by MSHA under the applicable requirements of 30 CFR parts 18 through 36. Before hand-held drills are moved from one working area to another, air shall be turned off and bled from the hose. (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. This record shall be retained until the rope is retired from service. No miner shall be exposed at any time to airborne concentrations of asbestos in excess of 1 fiber per cubic centimeter of air (f/cc) as averaged over a sampling period of 30 minutes. Movement of equipment on adjacent tracks. (1) Structurally sound, weather-resistant, equipped with a lid or cover, and with only nonsparking material on the inside; (2) Posted with the appropriate United States Department of Transportation placards or other appropriate warning signs that indicate the contents and are visible from each approach; (3) Located out of the blast area once loading has been completed; (4) Locked or attended when containing explosive material; and. Water or neutralizing agents shall be available where corrosive chemicals or other harmful substances are stored, handled, or used. 56/57.13021 High Pressure Hose Connections This standard requires the use of safety chains or other suitable locking devices at certain high-pressure hose-to-hose or hose-to- machine connections. (2) Onsite firefighting equipment for fighting fires beyond their early stages, or the mine shall have made prior arrangements with a local fire department to fight such fires. 57.12003 Trailing cable overload protection. [50 FR 4082, Jan. 29, 1985, as amended at 60 FR 33722, June 29, 1995]. [52 FR 24941, July 1, 1987, as amended at 52 FR 41397, Oct. 27, 1987]. Underground haulageways and travelways and surface area highwalls and banks adjoining travelways shall be examined weekly or more often if changing ground conditions warrant. 57.22218 Seals and stoppings (III, V-A, and V-B mines). In underground areas where dangerous accumulations of water, gas, mud, or fire atmosphere could be encountered, persons shall be removed to safe places before blasting. A switch that provides shunt protection in blasting circuits between the blast site and the switch used to connect a power source to the blasting circuit. Portable rigid ladders shall be provided with suitable bases and placed securely when used. MSHA considers substantial hard-toed shoes or boots to be the minimum protection acceptable for most mining applications. (2) Isolate any combustible material with noncombustible material. Each operator of an underground mine shall establish a check-in and check-out system which shall provide an accurate record of persons in the mine. When auxiliary fan systems are used, such systems shall minimize recirculation and be maintained to provide ventilation air that effectively sweeps the working places. Sec. (v) Testing speeds shall be a minimum of 10 miles per hour and a maximum of 20 miles per hour. Power circuits shall be deenergized before work is done on such circuits unless hot-line tools are used. At least 50 feet from: timbered areas, exposed combustible rock, and any other combustible material, Control door that meets the requirements for a ventilation door in conformance with, Within 50 feet but no closer than 20 feet of: timbered areas, exposed combustible rock, or other combustible material. (h) Seat belts construction. Under conditions of limited visibility these loads shall have a warning light at the end of the projection. (3) Category III applies to mines in which noncombustible ore is extracted and which liberate a concentration of methane that is explosive, or is capable of forming explosive mixtures with air, or have the potential to do so based on the history of the mine or the geological area in which the mine is located. (3) Evacuation. (2) All persons, except those working on the fan, shall be withdrawn, the ventilation shall be restored to normal and the air quality in the affected active workings shall be tested by a competent person to assure that the air quality meets the requirements of the standards in subpart D of this part, before any other persons are permitted to enter the affected active workings. Vehicles containing explosive material and oxidizers shall not be taken into a repair garage or shop. 52 FR 24941, July 1, 1987, unless otherwise noted. The notice shall specify the suggested changes and refer to the specific findings of fact, conclusions of law, and terms of the initial decision to be reviewed or appealed. 57.12065 Short circuit and lightning protection. Flammable or combustible liquid spillage or leakage shall be removed in a timely manner or controlled to prevent a fire hazard. Blasting cap means a detonator which is initiated by a safety fuse. (vi) Stopping distances shall be measured from the point at which the equipment operator receives the signal to apply the service brakes to the final stopped position. Equipment and supplies shall be loaded, transported, and unloaded in a manner which does not create a hazard to persons from falling or shifting equipment or supplies. L. 91173 as amended by Pub. The operator may discontinue calculating and recording the individual exposures of any personnel assigned to work in active working areas where radon daughter concentrations have been reduced to 0.3 WL or less for 5 consecutive weeks provided that such exposure calculation and recordation shall not be discontinued with respect to any person who has accumulated more exposure than 112 (one-twelfth) of a WLM times the number of months for which exposures have been calculated and recorded in the calendar year in which the exposure calculation and recordation is proposed to be discontinued. Dusts suspected of being explosive shall be tested for explosibility. Ventilation tubing shall be constructed of noncombustible material. The requirements of this standard apply to surface areas only. Guarding trolley wires and bare powerlines. (g) Safety fuse shall be ignited only with devices designed for that purpose. Separation of blasting circuits from power source. A method of refuge shall be provided while a second opening to the surface is being developed. MMH is performed by many types of workers in surface and underground mining including maintenance workers, electricians, mechanics, laborers, and some equipment operators. (3) Are constructed and maintained so that they will not create a hazard. 57.19129 Examinations and tests at beginning of shift. Flow-control devices (V-A and V-B mines). Persons shall not enter the mine until the mine has been ventilated for at least 15 minutes and the ventilating air has passed over the blast area and through at least one atmospheric monitoring sensor. (e) Potable water outlets shall be posted. Capped primer means a package or cartridge of explosives which is specifically designed to transmit detonation to other explosives and which contains a detonator. Frame grounding or equivalent protection shall be provided for mobile equipment powered through trailing cables. Ladderways constructed after November 15, 1979, shall have a minimum unobstructed cross-sectional opening of 24 inches by 24 inches measured from the face of the ladder. Circuits shall be protected against excessive overloads by fuses or circuit breakers of the correct type and capacity. Only electrical equipment that is approved by MSHA under the applicable requirements of 30 CFR parts 18 through 28 or approved under 30 CFR part 29 contained in the 30 CFR, parts 1199, edition, revised as of July 1, 1999, shall be used underground, except for submersible sump pumps. Purchase records noting sulfur content of diesel fuel. 57.22239 Actions at 2.0 percent methane (IV mines). (c) Berms may have openings to the extent necessary for roadway drainage. (3) Located in areas free of combustible materials or in areas where any exposed combustible materials are coated with one inch of shotcrete, one-half inch of gunite, or other noncombustible material with equivalent fire protection characteristics. 57.4505 Fuel lines to underground areas. To prevent hazards to persons underground, collars of open drawholes shall be free of muck or materials except during transfer of the muck or material through the drawhole. (1) The Assistant Secretary shall give notice of discretionary review to the mine operator and representative of the miners. [53 FR 32528, Aug. 25, 1988, as amended at 69 FR 38842, June 29, 2004]. If a device stops working properly during such operations, the operator must safely stop operations. (3) Effective May 20, 2008, a miner's personal exposure to diesel particulate matter (DPM) in an underground mine must not exceed an average eight-hour equivalent full shift airborne concentration of 160 micrograms of total carbon per cubic meter of air (160TC g/m3). If you have comments or suggestions on how to improve the www.ecfr.gov website or have questions about using www.ecfr.gov, please choose the 'Website Feedback' button below. Roll-down steel doors with a fire-resistance rating of 112 hours or greater, but without an insulation core, are acceptable provided that an automatic sprinkler or deluge system is installed that provides even coverage of the door on both sides. (3) If located 20 feet or more from exposed timber or other combustible material, the control doors or bulkheads shall provide protection at least equivalent to a door constructed of no less than one-quarter inch of plate steel with channel or angle-iron reinforcement to minimize warpage. 57.14160 Mantrip trolley wire hazards underground. [61 FR 36801, July 12, 1996, as amended at 67 FR 38385, June 4, 2002; 68 FR 32361, May 30, 2003; 69 FR 38842, June 29, 2004; 85 FR 2027, Jan. 14, 2020]. (b) Smoking is prohibited in surface milling facilities except in designated, dust-free smoking areas. When any substance is said to be insulated, it is understood to be insulated in a manner suitable for the conditions to which it is subjected. (4) Vented or otherwise constructed to prevent development of pressure or vacuum as a result of filling, emptying, or atmospheric temperature changes. Appendix I to Subpart M of Part 57National Consensus Standards. (c) Where such examinations disclose hazardous conditions, affected persons shall be informed and corrective action shall be taken. Dust containing volatile matter shall not be allowed to accumulate on the surfaces of enclosures, facilities, or equipment used in surface milling in amounts that, if suspended in air, would become an explosive mixture. Equipment shall not be operated in atmospheres containing 1.0 percent or more methane. (2) Automatically deenergize electrical equipment, except power to monitoring equipment determined by MSHA to be intrinsically safe under 30 CFR part 18, and prevent starting such equipment when methane levels reach 1.5 percent. (e) Blast holes shall be stemmed with a noncombustible material in an amount to confine the explosive charge. (2) Not be modified, in a manner that obscures visibility necessary for safe operation. Protective equipment and clothing for hazards and irritants. At the time of completion, the person performing inspections, tests, and maintenance of shafts and hoisting equipment required in standard 57.19120 shall certify, by signature and date, that they have been done. 57.19066 Maximum riders in a conveyance. (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. Atmospheric monitoring systems (I-A, II-A, and V-A mines). (c) Any place where the train operator's vision is obscured. (a) For 30 minutes if safety fuse and blasting caps are used; (b) For 15 minutes if any other type detonators are used; or. Surface buildings or other similar structures within 100 feet of mine openings used for intake air or within 100 feet of mine openings that are designated escapeways in exhaust air shall be, (a) Constructed of noncombustible materials; or, (b) Constructed to meet a fire resistance rating of no less than one hour; or, (c) Provided with an automatic fire suppression system; or. A safe means of passage around open shaft compartments shall be provided on landings with more than one entrance to the shaft. 57.15014 Eye protection when operating grinding wheels. Unless platforms or safety lines are used, persons shall not position themselves over drawholes if there is danger that broken rock or material may be withdrawn or bridged. (d) The Administrator shall promptly appoint an MSHA committee to investigate occurrences reported in accordance with paragraph (c) of this section or requests filed in accordance with paragraph (b) of this section. If more than 15 holes per person are to be fired, electric initiation systems, igniter cord and connectors, or other nonelectric initiation systems shall be used. (a) Open flames, including cutting and welding, shall not be used underground. (2) Equipped with supply and discharge operating controls. (a) Guards shall be constructed and maintained to, (1) Withstand the vibration, shock, and wear to which they will be subjected during normal operation; and. learn more about the process here. (2) Self-propelled mobile equipment manufactured prior to October 24, 1988, that is equipped with ROPS and seat belts that meet the installation and performance requirements of 30 CFR 57.9088 (1986 edition) shall be considered in compliance with paragraphs (b) and (h) of this section.
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