Ordinance on Industrial Safety and Health
Ministry of Labour Ordinance No. 32 of September 30, 1972
Latest Amendments:
Ministry of Health, Labour and Welfare Ordinance No. 47 of March 30, 2007
In Japanese
掲載日：2008.03.28
Part II Safety Standards
Chapter IV Prevention of Explosion, Fire, etc
Section 7 Blasting Work
Article 318 (Standards of Blasting Work)
- (1) The employer shall have the worker engaging the work set forth in item (i) of Article 20 of the Order (hereinafter referred to as “blasting work”) carry out the following matters:
- (i) Not to defreeze frozen dynamite by a dangerous method, such as bringing it in proximity to fire or in direct contact with a steam pipe or other high-temperature object.
- (ii) When charging gunpowder or explosives, not to use naked fire or smoke nearby.
- (iii) To use a safe charging tool, which are unlikely to cause an explosion due to friction, shock, static electricity, etc.
- (iv) To use a safe stemming, which are unlikely to cause an ignition or an inflammation, such as clay or sand.
- (v) When the charged gunpowder does not explode after ignition, or when it is difficult to confirm that the charged gunpowder has exploded, to comply with the following provisions:
- (a) When using an electric detonator, to remove the blasting leading wire from the igniter and make the end of the said leading wire short-circuit, and take measures to prevent re-ignition; and not to approach the place where the gunpowder is charged within five minutes after the above measures are taken.
- (b) When using device other than an electric detonator, not to approach the place where the gunpowder is charged within 15 minutes after ignition.
- (2) The worker engaging in the work set forth in the preceding paragraph shall carry out the matters listed in each item of the same paragraph.
Article 319 (Leader for Fuse Blasting Work)
- (1) The employer shall, when carrying out fuse blasting work, appoint a leader from those eligible to the said work, and have the said leader carry out the following matters:
- (i) To instruct workers other than those engaging in igniting work to evacuate the work site before ignition.
- (ii) To instruct workers engaging in the igniting work on the place for evacuation and the route to the place.
- (iii) When a worker takes charge of five or more ignitions at a time, have each worker use device notifying the time of evacuation such as a blasting watch and waste fuses.
- (iv) To instruct workers on the procedures and specification of the igniting work.
- (v) To give a signal of ignition.
- (vi) To give a signal of evacuation to workers engaging in the igniting work.
- (vii) To check misfires or for residual gunpowder.
- (2) The leader for fuse blasting work shall carry out the matters listed in each item of the preceding paragraph.
- (3) The worker engaging in the fuse blasting work shall follow the instructions and signals given by the leader pursuant to the provision of the preceding paragraph.
Article 320 (Leader for Electric Blasting Work)
- (1) The employer shall, when carrying out electric blasting work, appoint a leader from those eligible to the said work and have the said leader carry out the matters set forth in items (v) and (vii) of paragraph (1) of the preceding Article and the following matters:
- (i) To instruct the workers engaging in the said work on the place for evacuation and the route to the place.
- (ii) To confirm that workers have been evacuated the dangerous area before ignition.
- (iii) To appoint a person in charge of ignition.
- (iv) To give instructions on the place of ignition.
- (2) The leader of the electric blasting work shall carry out the matters listed in each item of the preceding paragraph.
- (3)The worker engaging in the electric blasting work shall follow the instructions and signals given by the leader pursuant to the provision of the preceding paragraph.
Article 321 (Evacuation)
- (1) The employer shall, in the case of a blasting work, and when it is impossible for workers to evacuate to a safe distance from the work site, provide an evacuation shelter with a solidly protected front and top.
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