1983 Ed.] Dangerous Goods (General) Regulations [CAP. 295
57. Where any shot fails to fire-
(a) if the firing was effected electrically, the circuit shall be tested again, and an attempt shall be made to refire the charge before it is approached by any person, and, if the attempt fails, the leads shall be disconnected from the exploder by the shot firer and 5 minutes shall be allowed to elapse before the charge is approached;
(b) if the firing was effected by safety fuse, the charge shall not be approached by any person until not less than one-half of an hour has elapsed since the firing;
(c) if the bore hole is tamped but undamaged, the tamping shall be carefully removed with a wooden or copper scraper or scoop and a fresh primer shall be placed against the charge, tamped and fired;
(d) if the bore hole is damaged, another hole shall be drilled parallel to the first hole and not less than 300 mm distant from it and shall be loaded, tamped and fired;
(e) the place where the misfire occurred shall be searched after the firing for any unexploded explosive;
(f) no explosive, detonator, detonator wire or fuse shall be withdrawn from the bore hole containing the charge;
(g) the misfired explosive shall not be used again or returned to the store but shall be destroyed by some safe and suitable method by the shot firer in charge of the blasting;
B 29
[Subsidiary]
Misfires.
L.N. 119/83.
(h) the charge shall not be approached within 15 m by any person other than the shot firer in charge of the blasting until the explosive has been removed or fired or rendered safe;
L.N. 119/83.
(i) if the direction of the bore hole cannot be accurately ascertained, a surface charge may be used.
(2) Where blasting is carried out under water, the provisions of this regulation shall apply subject to such modification as that circumstance may require.
58. (1) Any shot firer in charge of blasting shall notify the person by whom he is employed of any special precautions which he may consider necessary for the safety of persons or property in the neighbourhood.
(2) Except with the permission of the Authority, no blasting shall be carried out until any precautions notified under this regulation have been taken.
Special precautions.