Self-contained breathing apparatus of a duration to allow for escape from the mine and sufficient in number to equip all persons underground shall be strategically located throughout the mine. To prevent injury to personnel, tools and other objects shall not be left loose on the mast or drill platform. (ii) The blasting agent portion of the facility may be used for the storage of other necessary equipment; (3) Kept clean, suitably dry, and orderly; (4) Provided with unobstructed ventilation openings; (5) Kept securely locked unless all access to the mine is either locked or attended; and. (b) At the completion of each inspection or test required by this standard, the person making the inspection or test shall certify that the inspection or test has been made and the date on which it was made. A record of the measurements and the date shall be made by the person taking the measurements. 57.22236 Actions at 1.0 percent methane (VI mines). Mine opening means any opening or entrance from the surface into a mine. At least a 15-foot air gap shall be provided between the blasting circuit and the electric power source. Mobile equipment means wheeled, skid-mounted, track-mounted, or rail-mounted equipment capable of moving or being moved. Small quantities of flammable liquids drawn from storage shall be kept in safety cans labeled to indicate the contents. 57.19038 Platforms around elevated head sheaves. 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. A visual check of the completed circuit shall be made to ensure that the components are properly aligned and connected. And one of the key officials making sure it all runs smoothly is Dnipro Mayor Borys Filatov a tough-talking, chain-smoking, brawny man with a flair for the dramatic and hunger for adventure . Warning signs shall be readily visible, legible, and display the nature of the hazard and any protective action required. Hoisting signal devices shall be positioned within easy reach of persons on the shaft bottom or constantly attended by a person stationed on the lower deck of the sinking platform. Carbide lights, liquefied petroleum gas torches, and cigarette lighters shall not be used to light safety fuse. (3) The make and model number of the equipment for which the ROPS is designed. When persons are hoisted, the signaling devices shall be attended until the crosshead has been engaged. 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. (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; and. Except where automatic shutoff valves are used, safety chains or other suitable locking devices shall be used at connections to machines of high-pressure hose lines of 34-inch inside diameter or larger, and between high-pressure hose lines of 34-inch inside diameter or larger, where a connection failure would create a hazard. (b) The operator or the representative of the miners shall have the right to request of the Administrator reassignment of the mine to a more appropriate category or subcategory if, based on operating experience, the conditions set forth in 57.22003(b) indicate that the hazards of methane exist under circumstances more appropriately governed by a different category or subcategory. (2) Blasting units used to fire more than 20 detonators shall provide at least 2 amperes through each detonator but not more than an average of 100 amperes through one ohm for 10 milliseconds, and provide the necessary current for at least the first 5 milliseconds with a cutoff not to exceed 10 milliseconds. (b) A protective cover over the oxygen flow indicator. (1) Connections with other initiation devices shall be secured in a manner which provides for uninterrupted propagation; (2) Factory-made units shall be used as assembled and shall not be cut except that a single splice is permitted on the lead-in trunkline during dry conditions; and. When rails are moved, replaced, or broken bonds are discovered, they shall be rebonded within three working shifts. 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. When rotary jet piercing equipment requires refueling at locations other than fueling stations, a system for fueling without spillage shall be provided. If used as an alternative, routing the mine shop exhaust air directly to an exhaust system shall be done so that no person would be exposed to toxic gases in the event of a shop fire. (c) Provisions shall be made for control or containment of the entire volume of the fuel line so that leakage will not create a fire hazard. Unless damage or deterioration is removed by cutoff, wire ropes shall be removed from service when any of the following conditions occurs: (a) The number of broken wires within a rope lay length, excluding filler wires, exceeds either, (1) Five percent of the total number of wires; or. Subpart FDrilling and Rotary Jet Piercing. Such testing shall be done at the following locations: (b) Where such examinations disclose hazardous conditions, affected persons shall be informed and corrective action shall be taken. 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. 57.19080 Hoisting tools, timbers, and other materials. (a) Before a tire is removed from a vehicle for tire repair, the valve core shall be partially removed to allow for gradual deflation and then removed. 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. II Inspection of Boilers and Pressure Vessels, III Repairs and Alterations to Boiler and Pressure Vessels by Welding, IV Shop Inspection of Boilers and Pressure Vessels, V Inservice Inspection of Pressure Vessels by Authorized Owner-User Inspection Agencies, B Non-ASME Code Boilers and Pressure Vessels, C Storage of Mild Steel Covered Arc Welding Electrodes, D-R National Board R (Repair) Symbol Stamp, D-VR National Board VR (Repair of Safety and Safety Relief Valve) Symbol Stamp, D-VR1 Certificate of Authorization for Repair Symbol Stamp for Safety and Safety Relief Valves, D-VR2 Outline of Basic Elements of Written Quality Control System for Repairers of ASME Safety and Safety Relief Valves. When compressed air is used, all necessary precautions shall be taken to protect persons from injury. (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. (2) Determined to be free of flammable gases by a flammable gas detection device prior to and at frequent intervals during the application of heat. Potable water means water which shall meet the applicable minimum health requirements for drinking water established by the State or community in which the mine is located or by the Environmental Protection Agency in 40 CFR part 141, pages 169182 revised as of July 1, 1977. 552(a) and 1 CFR part 51. Working place means any place in or about a mine where work is being performed. 57.22204 Main fan operation and inspection (I-A, II-A, III, and V-A mines). 57.12081 Bonding metal pipelines to ground return circuits. (b) Where there is evidence that the ground at a dumping location may fail to support the mobile equipment, loads shall be dumped a safe distance back from the edge of the unstable area of the bank. The instruction shall be given by MSHA personnel or by persons who are certified by the District Manager of the area in which the mine is located. In determining the blast area, the following factors, shall be considered: (3) Burden, depth, diameter, and angle of the holes. 3, 2006]. Each person shall be provided a minimum of 1.5 square feet of floor space. Torches shall be attended at all times while lit. (a) Mine operators must monitor as often as necessary to effectively determine, under conditions that can be reasonably anticipated in the mine, whether the average personal full-shift airborne exposure to DPM exceeds the DPM limit specified in 57.5060. The alarm shall be located so that it can be seen or heard by a person designated by the mine operator. (3) Connections between blastholes shall not be made until immediately prior to clearing the blast site when surface delay detonators are used. (b) At least one safety switch or equivalent method of protection shall be located outside the blast area and shall be in the open position until persons are withdrawn. Readily visible signs prohibiting smoking and open flames shall be posted where a fire or explosion hazard exists. Working level (WL) means any combination of the short-lived radon daughters in one liter of air that will result in ultimate emission of 1.3 105 MeV (million electron volts) of potential alpha energy, and exposure to these radon daughters over a period of time is expressed in terms of working level months (WLM). 57.19066 Maximum riders in a conveyance. FAR). (a) Inspected at regular intervals and maintained in safe, travelable condition; and. Scientists take part in drafting laws, government regulations and parliamentary hearings on law enforcement matters. Safety Devices and Maintenance Requirements. It is not an official legal edition of the CFR. 57.19061 Maximum hoisting speeds. 57.12039 Protection of surplus trailing cables. (a) Any diesel engine introduced into an underground area of a mine covered by this part after July 5, 2001, other than an engine in an ambulance or fire fighting equipment which is utilized in accordance with mine fire fighting and evacuation plans, must either: (1) Have affixed a plate evidencing approval of the engine pursuant to subpart E of Part 7 of this title or pursuant to Part 36 of this title; or. (d) All piping, valves, and fittings shall be: (3) Maintained in a manner which prevents leakage. Explosives are substances classified as explosives by the Department of Transportation in 173.53, 173.88, and 173.100 of Title 49 of the Code of Federal Regulations (1986 Edition). (a) More than one broken wire at an attachment; (b) Improper installation of an attachment; (d) Evidence of deterioration from corrosion at an attachment. (b) Berms or guardrails shall be at least mid-axle height of the largest self-propelled mobile equipment which usually travels the roadway. 57.22226 Testing for methane (IV mines). Smoking and use of open flames shall not be permitted within 50 feet of explosive material except when separated by permanent noncombustible barriers. A suitable communication system shall be provided at the mine to obtain assistance in the event of an emergency. (c) If methane reaches 1.0 percent at a work place and there has been a failure of the main ventilation system, all persons shall be withdrawn from the mine. (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. Heat sources capable of producing combustion shall be separated from combustible materials if a fire hazard could be created. Positive-action-type brakes and devices which apply the brakes automatically in the event of a power failure shall be provided on aerial tramways. Flammable gas means a gas that will burn in the normal concentrations of oxygen in the air. A back-up system shall be provided for a hoist enclosure ventilation system provided by either of the methods set forth in paragraphs (a) (2) and (3) of this section. 57.12083 Support of power cables in shafts and boreholes. (c) Fire extinguishers or fire suppression systems shall be of a type and size that can extinguish fires of any class in their early stages which could originate from the equipment's inherent fire hazards. Flammable and Combustible Liquids and Gases. Within 45 calendar days after promulgation of this standard a copy of the plan and revisions thereof shall be available to the Secretary or his authorized representative. (b) The operator shall maintain the form entitled Record of Individual Exposure to Radon Daughters (Form 40009), or equivalent forms that are acceptable to the Administrator, Metal and Nonmetal Mine Safety and Health, Mine Safety and Health Administration, on which there shall be recorded the specific information required by the form with respect to each person's time-weighted current and cumulative exposure to concentrations of radon daughters. This document is available at any MSHA Metal and Nonmetal Safety and Health district office. 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. (1) The health risks associated with exposure to diesel particulate matter; (2) The methods used in the mine to control diesel particulate matter concentrations; (3) Identification of the personnel responsible for maintaining those controls; and. 57.14160 Mantrip trolley wire hazards underground. 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. When any visible condition that results in a reduction of rope strength is present, the affected portion of the rope shall be examined on a daily basis. (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. (c) Only the blaster shall have the key or other control to an electrical firing device. Explosive material. When a laminated partition is used, operators must follow the provisions of IME Safety Library Publication No. 53 FR 32526, Aug. 25, 1988, unless otherwise noted. Where manual scaling is performed, a scaling bar shall be provided.