PART VExplosion and Fire Protection (continued)
Dust Reduction Measures
(2) Dry areas underground in which coal dust is produced shall be systematically wetted down with water.
(3) To reduce coal dust underground,
(a) where the concentration of flammable gas in the air in the roadway does not exceed 1 per cent, not less than 75 per cent by weight of incombustible dust; and
(b) where the concentration of flammable gas in the air in the roadway exceeds 1 per cent, not less than 80 per cent by weight of incombustible dust.
(2) Subject to subsection (3), the incombustible dust referred to in subsection (1) shall contain not less than 70 per cent by weight of fine material that is capable, when dry, of passing through a sieve of 200 mesh.
(3) Where a larger percentage of incombustible dust than the percentage referred to in subsection (1) is used, the percentage of fine material referred to in subsection (2) may be reduced in proportion to the increase in the amount of incombustible dust, but in no case shall it be less than 25 per cent.
135 (1) At least once every month, samples of dust shall be taken from the floor, roof and sides along the length of each roadway underground and shall be analysed to determine the percentage of combustible material therein.
(2) The employer shall, in respect of the analysis referred to in subsection (1),
136 Not less than 20 bags of incombustible dust, each weighing not less than 25 kg, shall be stored for emergency use within 150 m of each working face in the intake airway and within 40 m of each working face in the return airway.
Explosion Protection Barriers
(2) A stone-dust barrier referred to in subsection (1) shall hold not less than 100 kg of stone dust per square metre of area of the roadway that it serves.
(3) A water barrier referred to in subsection (1) shall contain not less than 200 L of water per square metre of area of the roadway that it serves.
Sources of Ignition
138 All electrical equipment that is used underground shall be intrinsically safe or shall be flameproof.
(2) An employee who holds a certificate as a mine examiner shall inspect every locked-flame safety lamp before it is taken underground to determine that it is securely locked and is safe for use underground.
140 Where a locked-flame safety lamp is damaged underground, the flame shall be extinguished and the lamp shall not be relit underground.
(a) the employer has given not less than 24 hours notice of the work to a safety officer at the district office;
(b) the air in the area where the work is carried out is tested before and during the work and the concentration of flammable gas in the air is found to be not more than 0.25 per cent;
(c) the area that is within 8 m of the location where the work is carried out is cleared of all combustible substances and materials that are not necessary for the operation of the coal mine and is thoroughly wetted down;
(d) guards are installed to prevent sparks from escaping from the area where the work is carried out;
(e) two portable fire extinguishers that have a rating of 10A:60B:C and that meet the standards set out in National Standard of Canada standard CAN4-S508-M83, Rating and Fire Testing of Fire Extinguishers, dated June 1983, are readily available at the location where the work is carried out; and
(f) the work is under the constant supervision of a qualified person.
(2) Where welding, soldering, brazing or other open-flame or heating work is carried out underground, an employee who holds a certificate as a mine examiner shall remain in attendance at the location where the work was carried out for a period of 24 hours after the work ceases.
(3) All conveyor belts underground shall be so constructed that they are fire-retardant and anti-static.
(4) Where practicable, lubricants and hydraulic fluids that are used in machinery underground shall be fire-retardant.
Alcohol and Drugs
(2) Subject to subsection (3), paragraph (1)(a) does not apply to an employee who is in possession of a drug that has been prescribed for the employee by a physician or any other drug the sale of which is authorized under the laws of Canada.
(3) No person shall enter a coal mine if the person is under the influence of alcohol or drugs to such an extent as to constitute a danger to any employee.
(4) A warning sign of durable construction shall be posted in a conspicuous place at the lamp house of every coal mine and shall bear the following, in white letters not less that 65 mm high on a red background:
“No alcohol, drugs, smoking, matches, lighters or other articles for use in smoking” and “Défense de fumer ou d’avoir en sa possession des spiritueux, une drogue, une allumette, un briquet ou un autre article pour fumer”
“Random searches of persons going underground may be carried out for alcohol, drugs and articles for use in smoking.” and “Les personnes qui pénètrent dans la partie souterraine peuvent faire l’objet de fouilles au hasard pour les spiritueux, les drogues et les articles pour fumer.”
(a) every person who is not an employee and who is granted access to the underground portion of the coal mine;
(b) every employee who is not normally employed underground and who is granted access to the underground portion of the coal mine; and
(c) at least 10 per cent of employees who are normally employed underground.
(2) Searches referred to in subsection (1) shall be made
(a) in the case of a person referred to in paragraph (1)(a) or (b), immediately before the person goes underground; and
(b) in the case of an employee referred to in paragraph (1)(c), after the employee leaves the wash house and before the employee goes underground, or at any time when the employee is underground.
(3) The mine manager or the underground manager and at least one designated person shall be present to witness any search referred to in subsection (1).
(4) A person who is selected as the subject of a search under this section may, instead of being searched by another person, search himself in the presence of the witnesses referred to in subsection (3) and two witnesses of the person’s own choosing.
(5) Where a person who has entered a coal mine is found to have in the person’s possession any thing referred to in subsection 142(1), the person shall
(6) A complete record of the finding of any thing referred to in subsection 142(1) in the possession of any person shall be made by the mine manager and kept above ground at the coal mine for a period of not less than 10 years after the date of the finding.
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