112. (1) A qualified person shall measure and record the concentration of respirable dust in the air at the locations referred to in subsection 111(2) at least once every month.
(2) The employer shall, once every month, send a copy of the records referred to in subsection (1) to a safety officer at the district office.
113. (1) At least 30 days before the introduction or alteration of a ventilation system underground, the employer shall submit a plan of the proposed ventilation system to the Coal Mining Safety Commission for approval.
(2) The plan referred to in subsection (1) shall indicate
(a) the location of all fans and their capacities;
(b) the location of all regulators, airways, stoppings, doors and ducts;
(c) the direction of air circulation;
(d) the minimum quantity of air that it is proposed to circulate through each section shown in the plan; and
(e) the location and type of stone-dust and water barriers.
(3) Subsection (1) does not apply in respect of adjustments in a ventilation system that are necessary to regulate and compensate for the normal day-to-day variations in ventilation conditions underground.
Fans — Basic Standards
114. (1) Every main fan shall be
(a) equipped with devices that are capable of reversing the airflow controlled by the main fan;
(b) located above ground in a fan house constructed of non-flammable materials; and
(c) offset from all shafts or connections to the underground portions of the coal mine.
(2) Every fan house referred to in paragraph (1)(b) shall be provided with a pressure release door or other device that is easily opened by the force of an explosion.
(3) No combustible material shall be stored in a fan house referred to in paragraph (1)(b).
Safe Operating Procedures for Booster Fans
115. (1) No booster fan shall be installed unless a ventilation survey is carried out to demonstrate the necessity for the booster fan, the expected performance range while in operation, the location of the booster fan and its effect on the remainder of the ventilation network.
(2) Ninety days before the installation of a booster fan, the employer shall submit to the Coal Mining Safety Commission for approval a copy of the survey referred to in subsection (1) and a plan for the operation and maintenance of the booster fan.
(3) Every booster fan shall be located in such a manner that, if it stops, it will not restrict the free passage of air delivered by the main fan.
(4) The booster fan system shall be designed so that routine inspection and maintenance may be carried out without stopping the booster fan or interfering with the provision of ventilation by the booster fan.
(5) The power to a booster fan shall be automatically cut off if the percentage of flammable gases in the intake air passing through the fan drive room exceeds 0.5 per cent.
(6) Every booster fan shall have an automatic fire suppression system to suppress fires that may occur in the fan drive room or within 15 m on either side of the booster fan.
(7) The employer shall provide a means to control recirculation of air through the booster fan.
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