30 CFR Subpart R - Personnel Hoisting | Electronic Code of Federal Operator-carrying overhead cranes shall be provided with. (d) Certification of examinations shall be made by signature and date. (a) Uniform fittings or readily available adapters for onsite firefighting equipment; (b) Readily available wrenches or keys to open the valves; and. Explosive material shall not be transported on a locomotive. Suitable means that which fits, and has the qualities or qualifications to meet a given purpose, occasion, condition, function, or circumstance. Tests for methane shall be conducted in the mine atmosphere by a competent person, (a) At least once each shift prior to starting work in each face and raise; and. 57.19062 Maximum acceleration and deceleration. 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. (4) The operator's records of individual exposure to concentrations of radon daughters and copies of Record of Individual Exposure to Radon Daughters (Form 40009) or acceptable equivalent form or true legible facsimiles thereof (microfilm or other), shall be retained at the mine or nearest mine office for a period as specified in paragraph 9.8, ANSI N13.81973, or shall be submitted to the Mine Safety and Health Administration. Where rope guides are used in shafts other than in shaft sinking operations, the rope guides shall be a type of lock coil construction. On underground rail haulage, trip lights shall be used on the rear of pulled trips and on the front of pushed trips. A statement of reasons for the action taken shall be included in the final decision. We recommend you directly contact the agency responsible for the content in question. Movement of independently operating rail equipment. Other timber shall be coated with one inch of shotcrete, one-half inch of gunite, or other noncombustible materials. The Mine Act gives the Secretary of Labor authority to develop, promulgate, and revise health or safety standards for the protection of life and prevention of injuries in the nation's mines. (C) A second fan capable of accomplishing ventilation reversal shall be available for use in the event of failure of the main fan; (iii) Provide rapid air reversal that allows persons underground time to exit in fresh air by the second escapeway or find a place of refuge; and. 57.22238 Actions at 2.0 percent methane (I-B, II-B, V-B, and VI mines). (4) Whether or not conditions encountered during primary or access development are transient or permanent. (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. (i) Provide at all times at least the same degree of protection to persons underground as would be afforded by the installation of control doors; (ii) Be accomplished by a main fan. Drill holes large enough to constitute a hazard shall be covered or guarded. If methane reaches 0.5 percent in the mine atmosphere, ventilation changes shall be made to reduce the level of methane. (2) Combustible liquids in closed containers. Fixed ladders with an inclination of more than 70 degrees from the horizontal shall be offset with substantial landings at least every 30 feet or have landing gates at least every 30 feet. 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. 57.22601 Blasting from the surface (I-A mines). (c) Where flyrock might damage exposed safety fuse, the blast shall be timed so that all safety fuses are burning within the blastholes before any blasthole detonates. Appropriate supervisors or other designated persons shall examine and, where applicable, test ground conditions in areas where work is to be performed, prior to work commencing, after blasting, and as ground conditions warrant during the work shift. (b) Boreholes shall be drilled in such a manner to insure that the advancing face will not accidently break into an abandoned mine or abandoned working. (c) Vehicles used for dispensing bulk explosive material shall, (1) Have no zinc or copper exposed in the cargo space; and. (a) Areas surrounding storage facilities for explosive material shall be clear of rubbish, brush, dry grass, and trees for 25 feet in all directions, except that live trees 10 feet or taller need not be removed. 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. 75.1400-1 (b) To prevent injury from wheel rims during tire inflation, one of the following shall be used: (1) A wheel cage or other restraining device that will constrain all wheel rim components during an explosive separation of a multi-piece wheel rim, or during the sudden release of contained air in a single piece rim wheel; or. 57.17001 Illumination of surface working areas. (2) Separated from explosives or blasting agents by 4 inches of hardwood or equivalent, or a laminated partition. Scaling means removal of insecure material from a face or highwall. Additional inspections shall be made or other fire prevention measures shall be taken if a fire hazard continues to exist. Manual material handling (MMH) is the process of routinely moving and handling objects by carrying, holding, lifting, pulling, pushing, and stooping. The notification shall include the mine name, location, the company name, mailing address, person in charge, and whether operations will be continuous or intermittent. Slurry (as applied to blasting). During performance of an activity underground described in Table C2 or when falling sparks or hot metal from work performed in a shaft, raise, or winze could pose a fire hazard, (a) A multipurpose dry-chemical fire extinguisher shall be at the worksite to supplement the fire extinguishing equipment required by 57.4600; and. Upon or near all such safeguards, trespass warnings and appropriate danger notices shall be posted. To prevent accidental release of gases from hoses and torches attached to oxygen and acetylene cylinders or to manifold systems, cylinder or manifold system valves shall be closed when, (b) The torch and hoses are left unattended; or. The written examination is 30 questions pertaining to State laws/regulations and arc flash. (2) The reasons for placement or change in placement; (4) The applicable standards and a time schedule for the mine operator to achieve compliance; (5) Whether or not conditions encountered during primary or access development are transient or permanent; and. Circuit breaker means a device designed to open and close a circuit by nonautomatic means and to open the circuit automatically on a predetermined overcurrent setting without injury to itself when properly applied within its rating. A method of refuge shall be provided while a second opening to the surface is being developed. 57.3200 Correction of hazardous conditions. (iv) Be done according to predetermined conditions and procedures. (b) Where persons are required to move around or over any facility listed in this standard, suitable walkways or passageways shall be provided. Operators of self-propelled mobile equipment shall maintain control of the equipment while it is in motion. If it is found or suspected that any part is not functioning properly, the hoist shall not be used until the malfunction has been located and repaired or adjustments have been made. The main intake and return air currents in single shafts shall be separated by ventilation tubing, curtain walls, or partitions. (c) All instructional material, handouts, visual aids, and other such teaching accessories used by the operator in the courses prescribed in paragraphs (a) and (b) of this section shall be available for inspection by the Secretary or his authorized representative. High-potential electrical conductors shall be covered, insulated, or placed to prevent contact with low potential conductors. Persons shall not smoke and open flames shall not be used in the vicinity of the oxygen storage and supply lines. Crossovers, elevated walkways, elevated ramps, and stairways shall be of substantial construction, provided with handrails, and maintained in good condition. Explosive means any substance classified as an explosive by the Department of Transportation in 49 CFR 173.53, 173.88 and 173.100 which are incorporated by reference. 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. Weekly testing (I-A, III, and V-A mines). 57.19065 Lowering conveyances by the brakes. (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. This standard does not apply to compressed-air powered equipment without inherent fire hazards. Readily visible signs prohibiting smoking and open flames shall be posted where a fire or explosion hazard exists. Damaged or deteriorated explosive material shall be disposed of in a safe manner in accordance with the instructions of the manufacturer. Positive stopblocks or a derail switch shall be installed on all tracks leading to a shaft collar or landing. [50 FR 4082, Jan. 29, 1985, as amended at 50 FR 20100, May 14, 1985]. Damaged, loosened, or dislodged timber use for ground support which creates a hazard to persons shall be repaired or replaced prior to any work or travel in the affected area. CDC - Mining Topic - Manual Materials Handling - NIOSH 57.19065 Lowering conveyances by the brakes. (a) When the entire length of a conveyor is visible from the starting switch, the conveyor operator shall visually check to make certain that all persons are in the clear before starting the conveyor. Automatic hoists shall be provided with devices that automatically apply the brakes in the event of power failure. (1) Capable of withstanding working pressures and stresses and compatible with the type of liquid stored; (2) Maintained in a manner that prevents leakage; (3) Isolated or separated from ignition sources to prevent fire or explosion; and. 57.9260 Supplies, materials, and tools on mantrips. A plan of the mine ventilation system shall be set out by the operator in written form. 57.4530 Exits for surface buildings and structures. Short circuit means an abnormal connection of relatively low resistance, whether made accidentally or intentionally, between two points of difference potential in a circuit. The quantity of air across each face at a work place shall be at least 2,000 cubic feet per minute. (a) Dumping locations shall be visually inspected prior to work commencing and as ground conditions warrant. Procedures for inspection, testing, and maintenance. For information on the availability of this material at NARA, call 2027416030, or go to: http://www.archives.gov/federal_register/code_of_federal_regulations/ibr_locations.html. Abandoned workings means deserted mine areas in which further work is not intended. 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. Blasting shall not be done when 1.0 percent or more methane is present. Category II is divided into Subcategories II-A and II-B as follows: (i) Subcategory II-A applies to domal salt mines where an outburst reportable under 57.22004(c)(1) has occurred. Such a plan shall be updated as necessary and shall be reviewed jointly by the operator and the Secretary or his authorized representative at least once every six months from the date of the last review. (iii) The engine shut off unless powering a device being used in the loading operation. Please do not provide confidential Switch throws shall be installed to provide clearance to protect switchmen from contact with moving trains. Examples of detonators are blasting caps, electric or non-electric instantaneous or delay blasting caps and delay connectors. 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. 57.19074 Riding the bail, rim, bonnet, or crosshead. (a) Except as provided in paragraph (b), the exposure to airborne contaminants shall not exceed, on the basis of a time weighted average, the threshold limit values adopted by the American Conference of Governmental Industrial Hygienists, as set forth and explained in the 1973 edition of the Conference's publication, entitled TLV's Threshold Limit Values for Chemical Substances in Workroom Air Adopted by ACGIH for 1973, pages 1 through 54, which are hereby incorporated by reference and made a part hereof. 57.19080 Hoisting tools, timbers, and other materials. When repair work which could produce a spark or flame is to be performed on a storage facility, (a) The explosive material shall be moved to another facility, or moved at least 50 feet from the repair activity and monitored; and. Persons shall not perform maintenance work between machinery or equipment and ribs unless the area has been tested and, when necessary, secured. All detonators in a round shall be made by the same manufacturer. 57.19069 Entering and leaving conveyances. (3) Shield the activity so that hot metal and sparks cannot cause a fire. (3) Located out of direct line with the forward and reverse airstream provided by the fan. (3) Loads in shaft or slope development when persons work below suspended loads. 57.19069 Entering and leaving conveyances. (b) Shelter holes shall not be used for storage unless a 40-inch clearance is maintained. (b) Faces shall be examined for proper placement of holes, possible breakthrough, and water. (c) Inspected for smoldering fires at the end of each shift. If methane reaches 0.25 percent in the mine atmosphere, changes shall be made to improve ventilation, and MSHA shall be notified immediately. This incorporation by reference has been approved by the Director of the Federal Register in accordance with 5 U.S.C. (d) Misfires occurring during the shift shall be reported to mine management not later than the end of the shift. When such energized cables are moved manually, insulated hooks, tongs, ropes, or slings shall be used unless suitable protection for persons is provided by other means. (c) Electrical switches and outlets shall be located outside the facility. Conductor means a material, usually in the form of a wire, cable, or bus bar, capable of carrying an electric current. 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. A container of not over five gallons capacity that is designed to safely relieve internal pressure when exposed to heat and has a spring-closing lid and spout cover. (a) Mine operators shall notify the appropriate MSHA District Manager of all nonapproved explosive materials and blasting units to be used prior to their use. (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. Maintenance between machinery or equipment and ribs. Roll protection means a framework, safety canopy or similar protection for the operator when equipment overturns. A standard code of hoisting signals shall be adopted and used at each mine. 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. Fixed ladders shall project at least 3 feet above landings, or substantial handholds shall be provided above the landings. When combinations of cages and skips are used in the same compartment, the cages shall be enclosed to protect personnel from flying material and the hoist speed reduced to man-speed as defined in standard 57.19061, but not to exceed 1,000 feet per minute. Employer means a person or organization which hires one or more persons to work for wages or salary. Seat belts shall be worn by the equipment operator except that when operating graders from a standing position, the grader operator shall wear safety lines and a harness in place of a seat belt. 57.12022 Authorized persons at major electrical installations. To protect personnel, material shall not be dropped from an overhead elevation until the drop area is first cleared of personnel and the area is then either guarded or a suitable warning is given. (f) When rock bolts tensioned by torquing are used as a means of ground support, (i) At least 50 percent of either the yield point of the bolt or anchorage capacity of the rock, whichever is less; and. Asbestos means chrysotile, cummingtonite-grunerite asbestos (amosite), crocidolite, anthophylite asbestos, tremolite asbestos, and actinolite asbestos. (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 1.0 percent; and.
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