Smoking not permitted
while charge are being
prepared.
Persons engaged in preparing charges pot to cany matches, etc.
Removal of explosives for blasting.
Preparing of charges for blasting.
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77. No person shall smoke at or near any blasting site while charges are being removed from the store, prepared or laid.
78. No person engaged in preparing charges or handling explosives at any blasting site shall carry any matches or any metal objects which might create a spark and cause premature detonation, except matches required for lighting fuses.
79. (1) When removing explosives from the store for blasting- (a) dynamite, gelignite or similar explosives shall be taken from the package or cartons and the cartridges shall be packed loosely in a canvas bag;
(b) gunpowder shall be placed in a brass, copper or alumi
container closed with a close-fitting lid:
(c) detonators and fuze shall not be carried in the same container
as explosives:
(d) detonators shall be kept in the box originally supplied by the manufacturers, or in a box designed to keep individual detonators separate and in which they cannot move freely; (e) fuze with detonators attached may be carried coiled in a brass, copper or aluminium container made to fit the coll and fitted with a hinged lid, or in a wooden box, and no crimping or other tools may be carried in such containers together with made up fuzes and detonators:
(f) only the quantity of explosive, fuze and detonators necessary
for immediate use shall be removed from the store.
(2) No explosives shall be removed from any store for blasting except under the personal supervision of an authorized shot firer.
80. When preparing charges for blasting-
(a) all explosives used shall be from fresh stocks and shail show
no signs of deterioration;
(b) detonators shall not be fitted on to fuze in or near Boy
explosives store;
(c) crimping of detonators to faze shall be done with a crimping tool and a sufficient stock of suitable crimping tool shall always be kept on hand:
(d) detonators shall be inserted into a hole made with a wooden
or copper pricker in the cartridge of explosive, and not more than one detonator shall be inserted in any primer charge:
h
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(e) where holes are wet, waterproof fuze shall be used and detonators shall be rendered waterproof with grease or cap
sealing compound.
91. When loading charges for blasting-
Loading of charges for
(a) cartridges shall not be unwrapped from their paper coverings blasting
without the permission of the Authority:
(b) metal or metal shod tamping rods shall not be used and the ends of any wooden or bamboo rods used for tamping shall be cut off square;
(c) bamboo rods shall be jointed, if necessary, with copper joints; (d) worn rods shall not be used until they are again cut off square
at their ends:
(e) all tamping rods shall have a diameter not exceeding one half
inch less than that of the hole to be tamped:
all tamping shall be done as lightly as possible;
(g) before tamping a small wad of paper, grass or similar substance
shall be placed on top of the charge to be tamped;
(h) not more than one man shall work on the tamping of any one
charge at any one time.
82. (1) When firing charges for blasting-
(0) blasting shall be done by means of bore hole charges only and no surface charges shall be used except with the permission of the Authority:
Provided that where blasting is to be done in or on the waters of the Colony the prior permission of the Director of Marine shall be obtained:
(b) no bore hole shall be loaded with more than such quantity of explosive as shall be determined by the shot firer in each par- ticular case:
(c) no blast shall be fired off unless the charge hole and the ad- jacent area is fully covered over and mattressed or weighted down with sufficiently heavy timber shields or such other precautions are taken as shall effectually prevent any fragments from being projected in a dangerous manner;
(d) where a series of bore holes have been drilled along a rock face and the length of any such hole exceeds six feet, all blasting shall be done simultaneously either by means of electric detonda- tors fired by use of an electric exploder, or by firing from electric mains or by some other type of detonating fuse approved by the Authority;
Firing of charges for blasting.
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