Coal Mining Occupational Health and Safety Regulations (SOR/90-97)

Inconsistent Provisions

6 In the event of an inconsistency between any standard incorporated by reference in a provision of these Regulations and any other provision of these Regulations, that other provision shall prevail to the extent of the inconsistency.

Qualifications

7 Before an employee is employed in a position of mine manager or is appointed to a position of underground manager or overman, the employee shall have obtained the qualifications required for all positions junior to that position.

Appointments and Supervision

• 8 (1) The employer shall employ a separate mine manager for each coal mine.

• (2) Subject to subsection (3), where a mine manager dies, resigns or is otherwise permanently prevented from discharging the responsibilities of mine manager, the employer shall

  • (a) identify in writing a person who holds a first class certificate as a mine official to perform the duties of the mine manager;

  • (b) identify in writing an underground manager to perform the duties of the mine manager; or

  • (c) stop the operation of the mine.

• (3) Within 90 days after an identification made under paragraph (2)(b), the employer shall comply with paragraph (2)(a) or (c).

9 Every coal mine shall be under the daily supervision of at least one underground manager and one overman.

PART IExplosives and Detonators

Storage and Handling

10 No explosive or detonator, other than an explosive or detonator set out in Schedule II, shall be used in a coal mine.

• 11 (1) No explosive or detonator shall be stored underground in a coal mine.

• (2) Explosives and detonators that are intended for use underground shall be stored in a structure above ground that has been approved by the Coal Mining Safety Commission.

• (3) The maximum quantity of explosives and detonators that are stored in accordance with subsection (2) shall be not more than the quantity required for use underground during the 24-hour period immediately following its storage.

• (4) Detonators shall be stored separately from explosives in a room that has a wall of masonry not less than 150 mm thick between it and any room in which explosives are stored.

• 12 (1) All explosives and detonators that are transported underground, other than explosives and detonators referred to in subsection 28(3) or 29(4), shall be in secure cases or canisters with the detonators in separate cases or canisters from the explosives.

• (2) No case or canister referred to in subsection (1) shall contain more than 5 kg of explosive unless approval for the transportation of the explosive in bulk has been given by the Coal Mining Safety Commission.

• 13 (1) Every employee who receives, transports or uses explosives or detonators shall return any explosive or detonator that is not used during the employee’s shift to the surface structure in which it had been stored.

• (2) Where an explosive or detonator is transported underground, it shall be kept in its secure case or canister until it is used.

• (3) Subject to subsection (4), each case or canister referred to in subsection (2) shall be kept separate from every other case or canister and from all equipment that is likely to cause the ignition of the explosive or the detonator, by as great a distance as is practicable in the area where the explosive or detonator is kept.

• (4) The distance referred to in subsection (3) shall be not less than 300 mm.

• 14 (1) A qualified person shall have control of the storage, issue and receipt of all explosives and detonators.

• (2) The qualified person referred to in subsection (1) shall

  • (a) test each detonator for electrical continuity before issuing it;

  • (b) issue detonators to no person other than a shotfirer; and

  • (c) receive and store unused explosives and detonators returned from underground.

Care of Blasting Machines

• 15 (1) A qualified person shall, at least once every three months, clean and thoroughly overhaul all blasting machines that are in service.

• (2) A record of the work performed pursuant to subsection (1) shall be made by the qualified person who performed the work.

Shotfirers

• 16 (1) No person other than a shotfirer shall fire a shot.

• (2) No shotfirer shall fire a shot unless the shotfirer has been authorized to fire that type of shot.

17 The handling of explosives and detonators in the preparation underground of a shot or shot hole shall be under the direct supervision and control of a shotfirer.

Shotfiring Procedures

18 Where shotfiring is to be done underground during a shift, the shotfirer shall verify that no more explosives or detonators than are required for the shotfiring are kept in the danger area referred to in paragraph 22(1)(a) in which the shotfiring is to be done.

• 19 (1) A shotfirer shall use

  • (a) only one class, grade or quality of explosive in a shot;

  • (b) an explosive that is in its original wrapping;

  • (c) no more explosive in any shot hole than the amount that is necessary for the work to be performed or the maximum amount of that type of explosive that is set out in column II of Part I of Schedule II, whichever is the lesser;

  • (d) tamping rods and stemmers that are constructed of non-metallic materials; and

  • (e) a cleaner and crack detector that is capable of cleaning the full length of the shot hole and detecting transverse and longitudinal cracks of 3 mm or more in the shot hole.

• (2) No shot shall be fired

  • (a) in broken coal or in a support pillar; or

  • (b) in an area where the concentration of flammable gas in the air exceeds 1.25 per cent.

• (3) Every coal-cutting machine shall be stopped before shots are fired at the return brushing face in a longwall section.

Preparations Before Charging a Shot Hole

20 Before initiating the preparations for charging a shot hole referred to in section 21, a shotfirer shall verify that all broken coal is removed from the area of the shot hole and shall allow sufficient time for dust in the air to settle.

21 A shotfirer shall, immediately before charging a shot hole underground,

• (a) subject to subsection 27(3), verify, using a methanometer and a locked-flame safety lamp, that the concentration of flammable gas in the general body of the air in the area of the shot hole and in any area contiguous thereto does not exceed 1.25 per cent;

• (b) examine the shot hole to verify that it has been thoroughly cleaned;

• (c) verify that the shot hole does not intersect any cracks or crevices greater than 3 mm;

• (d) verify that the shot hole is at least 3 mm larger than the diameter of the cartridge of the explosive to be used;

• (e) place a plug of stemming in the back of the shot hole; and

• (f) verify that any dust in the area of the shot hole has been treated with stone dust to a minimum of three 25 kg bags of stone dust per metre of advance.

Precautions Before Firing a Shot

• 22 (1) Before firing a shot, a shotfirer shall

  • (a) determine a danger area that extends at least 30 m from the shot hole;

  • (b) evacuate all persons from the danger area; and

  • (c) post sentries at the limits of the danger area.

• (2) The sentries referred to in paragraph (1)(c) shall prevent any person, other than the shotfirer, from entering the danger area until the shotfirer verifies that the area is safe to enter.

• (3) No person, other than a shotfirer, shall enter the danger area referred to in subsection (1) until the person has been informed by the shotfirer or a sentry that it is safe to do so.

23 Immediately before firing a shot, a shotfirer shall repeat the test referred to in paragraph 21(a).

24 Where a shot or round of shots is fired, the shotfirer shall make an examination of the effect of the shot or round of shots before the next shot or round of shots is fired.

Firing with a Blasting Machine

• 25 (1) Where a shot is to be fired with a blasting machine, the shotfiring cable shall be not less than 30 m long.

• (2) No person, other than a shotfirer, shall connect a shotfiring cable to detonator wires or to a blasting machine.

• (3) Where a shot is to be fired with a blasting machine, the shotfirer shall, in the following sequence,

  • (a) twist the ends of the shotfiring cable together at the blasting machine and isolate them from ground;

  • (b) check the shotfiring cable and the detonator circuit;

  • (c) connect the shotfiring cable to the shot;

  • (d) check the total circuit;

  • (e) verify that all persons in the danger area referred to in paragraph 22(1)(a) have been evacuated from that area;

  • (f) connect the shotfiring cable to the blasting machine, verifying that the shotfirer alone has possession and control of the blasting machine;

  • (g) shout “FIRE” or “TIR”;

  • (h) verify that the danger area referred to in paragraph 22(1)(a) is clear of persons;

  • (i) take cover outside the danger area referred to in paragraph 22(1)(a);

  • (j) fire the shot;

  • (k) subject to sections 28 and 29, wait at least five minutes before the shotfirer returns to the area of the shot hole to satisfy himself that no dangerous condition has resulted from firing the shot; and

  • (l) measure the concentration of flammable gas in the general body of the air in the area of the shot hole.

Single Shots

26 Subject to section 27, each shot hole shall be charged separately and each shot shall be fired singly.

Multi-shots

• 27 (1) Subject to subsections (2) to (4), rounds of shots may be fired in shafts, development drivages, cross-measure drivages, intake and return brushings of longwall faces and repair brushings.

• (2) Not more than 12 shots in a round may be fired simultaneously using the shortest millisecond-delay detonators.

• (3) A round of shots using different millisecond-delay detonators shall not be fired unless

  • (a) the concentration of flammable gas in the general body of the air in the area of the shot holes and in any area contiguous thereto does not exceed

    • (i) where the period between the detonation of the first shot and the detonation of the last shot is calculated not to exceed 0.2 second, 1 per cent, and

    • (ii) where the period between the detonation of the first shot and the detonation of the last shot is calculated to exceed 0.2 second but not to exceed 0.75 second, 0.8 per cent;

  • (b) the mine manager has issued to the shotfirer for each area of firing a copy of the shotfiring pattern that shows

    • (i) the position and direction of every shot hole in the round,

    • (ii) the maximum quantity of explosive to be used in each shot hole, and

    • (iii) the maximum length of each shot hole; and

  • (c) the maximum period that may elapse between the detonation of the first shot and the detonation of the last shot is

    • (i) where the shots are fired in a development drivage that contains no seam of coal exceeding 300 mm and that is more than 5 m from a waste or fault, 0.75 second or less, and

    • (ii) in all other cases, 0.2 second or less.

• (4) A copy of the shotfiring pattern for each area at which multi-shot firing is carried out in a mine shall be kept available above ground at the coal mine for examination by employees.

Misfired Shots

Single Shots

• 28 (1) Where a single shot misfires, the shotfirer shall, in the following sequence,

  • (a) remove the handle or key from the blasting machine and disconnect the blasting machine from the shotfiring cable;

  • (b) twist the ends of the shotfiring cable together at the blasting machine and isolate them from ground;

  • (c) wait 15 minutes;

  • (d) examine the shotfiring cable and connections for any defects and remedy any that are found; and

  • (e) make a further attempt to fire the shot using either the same blasting machine or another blasting machine that is suitable for the purpose.

• (2) Where the attempt to fire the shot referred to in paragraph (1)(e) fails, the shotfirer shall, in the following sequence,

  • (a) remove the handle or key from the blasting machine and disconnect the blasting machine from the shotfiring cable;

  • (b) twist the ends of the shotfiring cable together at the blasting machine and isolate them from ground;

  • (c) wait 15 minutes;

  • (d) mark the location of the detonator lead wires of the misfired shot;

  • (e) cause a new shot hole to be drilled at a distance of not less than 300 mm from the loaded shot hole and parallel to and equal in depth to that shot hole; and

  • (f) fire a shot in the newly drilled shot hole.

• (3) A shotfirer shall wait for five minutes after firing the shot referred to in paragraph (2)(f) and then, where practicable, sort the debris by hand, recover all explosives and detonators from the debris and take them to the structure referred to in subsection 11(2).