At what height is hoisting arrangements necessary?
(6.4) Hoisting arrangements shall be provided for every person who has to ascend in a vertical or inclined shaft, winze or other working when the height exceeds 150m vertically.
When shall a ladder way be provided?
(6.5.1) A ladder way shall be provided when the inclination from the horizontal exceeds 20º:
- In a shaft or outlet to surface if it is the only means of outlet to surface.
- In a connection from any part of the workings to a shaft or outlet to surface if such connection is the only means of outlet to a shaft or outlet to surface.
- In a shaft or wince in the course of sinking.
When is a ladder way not necessary?
(6.5.2.1) A ladder way need not to be provided if at least two winding plants of adequate capacity are available for immediate use to convey persons.
What are the requirements for the power supply to the two winding plants in lieu of a ladder way?
(6.5.2.1) Adequate power from at least two independent sources so that in the event of failure of one power supply the other supply will be readily available. A ring feed or duplicate supply lines will be considered as two independent power sources.
What are the requirements with regard to ladder ways in sinking shafts?
(6.5.1) The ladder way shall be within the minimum necessary distance from the bottom of the shaft to protect it from damage during blasting.
From the lower end of the ladder way there shall be provided:
- Chains, chain ladders or wire rope ladders if the inclination is more than 35º and less than 70º.
- Chain ladders or wire rope ladders where the inclination is 70º or more.
State the regulations for the standby winding plant?
(6.5.2.2) The standby winding plant shall be tested daily with a load equivalent to the total mass of the persons permitted by running the conveyance for a complete trip down and up the winding compartment. In the event such winding plant depending for its operation on power generated at the mine, sufficient fuel and essential stores for the generation of power for the operation of the winding plant shall be kept at the mine.
Ladder or stair ways:
The following provisions shall apply to every ladder or stairway in or on a mine:
(6.6.1) Where the inclination from the horizontal is more than 20º and less than 70º:
- The ladder shall not be continuous over a distance greater than 16 m.
Where the inclination from the horizontal is more than 35º:
- The ladder shall project at least 1 m above the mouth of the shaft or resting place except when a strong handrail is provided at such mouth or resting place.
(6.6.2) Where the inclination from the horizontal is 70º or more:
- Each section of any stairway or ladder shall not be more than 10 m without a break.
- Provided with resting places or resting platforms at the breaks, and
- Installed in such a way that the bottom end is not in line with a resting place or platform.
(6.6.4) Every permanent ladder or stairway with an inclination of 75º or more and a height exceeding 5 m:
- Shall be enclosed by a cage provided with a backrest.
- The backrest shall not be further than 700 mm from the rungs, and
- The backrest shall start from a point 2 m or less from the bottom of the ladder, and
- The backrest shall extend at least 900 mm beyond the resting point or platform.
What are the requirements of a ladder being fixed in an overhanging position?
(6.6.5) No ladder shall be fixed in an overhanging position.
How shall every ladder be constructed?
(6.6.6) – Every ladder shall be:
- Of strong construction.
- Securely fastened to the wall and
- Maintained in good order.
When shall a wire rope or strand of wire rope be used in a mine for climbing purposes?
(6.7) A wire rope or strand of wire rope shall not be allowed to be used for climbing purposes in a mine if the rope or strand is kinked, knotted or contains broken or projecting wires.