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Pentolite Booster
Explosives Division of GULF OIL Corporation Limited
manufactures Pentolite Booster, a high energy cast booster.
The explosive is filled in specially designed plastic containers
having a cap-well for priming detonator and a cord
tunnel for priming with detonating cord. The cord tunnel is
continuous, while the cap-well has a step at the top side of
the booster to prevent the detonator from passing through. A recessed groove at the base of the booster offers protection
to the lead wire or shocktube of the detonator.
Pentolite Booster can be initiated with No.6 strength
detonator or detonating cord having an explosive core of
10 grams/meter. However, use of No. 8 strength detonator
is recommended for reliable initiation of the booster.
Pentolite Booster consists of a mixture of Penta Erithrytol
Tetra Nitrate (PETN) and Tri Nitro Toluene (TNT) in the ratio
50:50. The two ingredients in a molten condition are
poured into the specially designed plastic containers and
allowed to solidify.
Pentolite Booster can be used for initiating boostersensitive
explosive in the drillholes in all surface mines,
quarries, civil construction, and in underground metal
mines for ring blasting, largehole stoping and vertical crater
retreat (VCR) blasting applications.
Advantages
- Very efficient primer for booster-sensitive explosives in
view of its high density and high velocity of detonation, resulting in high detonation pressure.
- Stable, and can be kept for long periods of time when
stored under recommended conditions.
- Has excellent water resistance, as its ingredients are
insoluble in water.
Does not get affected by hydrostatic heads normally
encountered in mining conditions.
Priming
Procedure
Priming with electric
and shock tube based
non-electric detonator
- Insert the detonator
into the cord tunnel
from the top, pass it
through and pull it out
of the other end.
- Insert the detonator
into the cap-well and
gently push it till the
stepped end, so that
detonator is snugly
placed inside the
booster (as shown in
photo).
- Alternately, insert the
detonator gently into the
cap-well and push it till
the end so that it is
snugly placed inside the
booster. Without leaving
any slack, fold back the
lead wire or shock tube
so that it lies along the
side of the booster
casing. Firmly tape the lead wire or shock tube to the booster.
- Lower the assembly into the drillhole.
Priming with detonating cord
- Pass the free end of the detonating cord through the cord
tunnel and pull it out from the other end.
- Tie the free end of the detonating cord into a knot so
that it prevents the booster from sliding through and rests
on the knot (as shown in photo).
- Alternately, pass the detonating cord through the capwell
and back through the cord tunnel. Tie a knot so that
the cord forms a loop through the booster.
- Lower the assembly into the drillhole.
- Where additional boosters are to be loaded, thread the
detonating cord through the cord tunnel and allow it to
slide down along the cord by gravity.
Specifications
| Density: |
1.58 ± 0.02 g/cc |
| Velocity of Detonation: |
6750 ± 250 m/sec |
| Detonation Pressure: |
240 kilo bar |
Weight and Dimensions
| Weight (grams) |
Diameter (mm) |
Height (mm) |
| 100 |
35 |
98 |
| 175 |
45 |
90 |
| 250 |
50 |
110 |
| 400 |
60 |
122 |
Packaging
Pentolite Boosters are packed in corrugated fiber board
cases. Markings on the case indicate manufacturer's name,
product name, booster weight, case number, date of
manufacture, net weight and gross weight.
Booster Weight
(grams) |
Quantity per case
(nos.) |
Total Weight
(kg) |
| 100 |
200 |
20 |
| 175 |
100 |
17.5 |
| 250 |
100 |
25 |
| 400 |
50 |
20 |
Precautions
- Do NOT subject explosives and detonators to impact,
friction or fire.
- NEVER force a detonator into the explosive.
- Do NOT attempt to scrape the explosive material or
attempt to enlarge the cap-well or cord tunnel for
accommodating detonator.
- Not recommended for use in hot drillholes beyond 80° C.
- Never carry out charging of explosives during an
approaching storm and lightning activity in the blast area.
Vacate the blast area and resume operations only after the
storm has passed.
- Do NOT attempt to fight explosive fires.
Statutory Classification and
Shipping Information
Petroleum & Explosives Safety
Organization (PESO),
Government of India |
Class 3
Division 2 |
| IMDG Classification: |
|
| Class |
1 |
| Division |
1.1 |
| Group |
D |
| U.N Number |
0042 |
| Page Number |
1227 |
| Stowage Category |
I |
 CE (Conformité Européenne) Mark is approved
for the following Pentolite Booster products:
- 175 grams
- 250 grams
- 400 grams
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