(1) of the occurrence of any of the following events:(a) an accident or incident related to a crane, hoist, headsheave, hoisting rope, cage, skip, bucket or to the timbering of a shaft;
(b) an explosion or a fire related to a compressor, a compressed air tank or pipe;
(c) an explosion related to a boiler;
(d) an abnormal or unexpected inrush;
(e) a crack in a watertight bulkhead or dam retaining more than 23 m3 of water (812 ft3);
(f) a fire in an underground mine, the head frame of a shaft, a hoistroom or an explosives magazine;
(g) a premature or unexpected firing provoking the ignition of explosives;
(h) an air blast or an important and unexpected ground movement;
(i) the fainting of a person due to harmful gas or oxygen deficiency;