Specification Part 3 - Road & Bridge Works - Urban Administration ...

(13) At a time, not more than 10 charges are prepared and fired.
(14) After blasting operations, all loose residual material below sub-grade is compacted and any
material removed from below sub-grade is replaced with suitable material.
(15) Maintain a day-to-day account of the explosives in an approved register. Such account shall be
open to inspection at all times.
(16) Sufficient arrangements should be made like posting of guards at proper locations so that no
person enters the area of influence during the blasting operations.
(17) All the materials, tools and equipment used for blasting operations shall be of approved type.
(18) Excavation by blasting shall be to the lines indicated in drawings, with the least disturbance to
the adjacent material.
(19) The magazine shall have a lightning conductor.
(20) The fuse to be used in wet locations shall be sufficiently water-resistant as to be unaffected
when immersed in water for 30 minutes.
(21) The rate of burning of the fuse shall be uniform and definitely known to permit such a length
being cut as will permit sufficient time to the firer to reach a safe point before explosion takes place.
(22) Detonators shall be capable of giving effective blasting of the explosives.
(23) The blasting powder, explosives, detonators, fuses, etc. shall be fresh and not damaged due to
dampness, moisture or any other cause.
(24) The charge holes shall be drilled to required depths and at suitable places.
(25) Important Hints:-
(i)
(ii)
(ii)(a)
(ii)(b)
(ii)(c)
(ii)(d)
(iii)
(iv)
(v)
(vi)
(vii)
(viii)
(ix)
(x)
(xi)
(xii)
Provide information describing pertinent blasting procedures, and dimensions to
Engineer prior to starting any phase of the operation,
Display prominently the following information in the lobby of magazine:
A copy of the relevant rules regarding safe storage both in English and in the
language with which the workers concerned are familiar.
A statement of up-to-date stock in the magazine.
A certificate showing the latest date of testing of the lightning conductor.
A notice that smoking is strictly prohibited.
Do intimate the hours of blasting to the people in vicinity.
Do drill the charge holes to required depths and at suitable places.
Do ensure that the man-in-charge counts the number of explosions and ensures that
all the charges have exploded before allowing workmen back to the site.
Do not perform blasting operation without written permission of Engineer.
Do not store explosives closer than 300 m from the road or from any building or
camping area or place of human occupancy.
Do not keep any damaged blasting powder, explosives, detonators fuses etc. at site.
Do not use any method of blasting which leads to over shooting
Do not undertake blasting after sunset.
Do no expose dynamite to the sun or allow it to get damp.
Do not ram or pound the charge but press firmly into place.