Raydet TLD (Trunk Line Delay)
Raydet TLD has been specifically developed for use
in surface blasting. Raydet TLD consists of a coil of Raytube
crimped to a Raydet delay cap housed in a special plastic
casing known as "Bunch Connector". The factory assembled
connector enables connections to be given to 6 Raytubes coming
from either down-hole or surface.
Raydet TLD are available in nominal time or instantaneous,
17 ms, 25 ms, 42 ms, 50 ms, 65 ms. The nominal time of Raydet
TLD are identified by tags attached to the coil and by the
colour code of the Bunch Connector. The colour code are as
follows:
|
Raydet TLD
|
Instantaneous
|
Green
|
Raydet TLD |
17 ms
|
Yellow
|
Raydet TLD |
25 ms
|
Red
|
Raydet TLD |
42 ms
|
White
|
Raydet TLD |
50 ms
|
White
|
Raydet TLD |
65 ms
|
Blue
|
Packing
Quantity/Case: 3.0 to 10.0M coils: 200 nos.
Case Dimensions: 555x315x390 mm (0.068 CBM). Fibre board cartons.
Advantages of Raydet TLD
- Eliminates usage of detonating cord/ detonating relay
on surface.
- Noiseless system as the shock wave is confined within
the Raytube.
- Used as surface delays between rows or drill holes.
- Provides an unlimited number of delays particularly helpful
in big blasts.
- Provides accurate delay per hole thereby improving fragmentation
and overall blast results.
- User friendly, as hook-up making is simple and less cumbersome.
Usage of Raydet TLD
- Lay the Raydet TLD on the surface close to the collar
of the drill hole.
- Insert the free end of the Raydet tube of the Raydet/Raydet
DTH from the drill hole into the bunch connector of the
Raydet TLD.
- Pull the inserted Raytube through the groove and make
a knot.
- Alternatively if the number of adjacent bore holes to
be hooked up are only 1 to 2 the hook-up can be made by
inserting the free end of the Raytube from the drill hole
through a groove of the bunch connector and instead of making
a knot re-insert back the free end into adjacent groove
and pull the free end thereby making a loop.
- Complete all connections using either the knot or loop
method.
- Select the required delays between the rows and make the
necessary connections.
- Check to ensure that all the connections are proper and
in order.
- Typical blast patterns using Raydets TLD are diagonal/V-Pattern.
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