Whenever an accident occurs in connection with the accidental ignition or detonation of explosives or their ingredients, or as a result of the use of explosives and in any other accident reportable under these regulations, which causes death or grievous bodily harm to any person, the place where the accident occurred must not be disturbed or altered before the arrival or without the consent of an inspector, unless such interference is unavoidable to prevent further accidents, to remove the dead or injured, or to rescue persons from danger.