JANUARY~DECEMBER 1963
wae
215
rubble material asfill, and the nature of the lip area as it wouldaffect
foundation and utility design.
.
Pre-Buggy
High explosive experiments were carried out in January and Feb-
ruary and June and July of 1963 at the Nevada Test Site to investigate
the spacing of charges in a simultaneously detonated row for exca-
vating a smooth channel. The results showed that when the spacing
between charges is equal to 1 to 1.25 times a single crater radius, a
smooth channel is produced with a width equal to, or greater than
the diameter of a single charge crater. Whenthe spacing is as large
as 1.5 times the single crater radius, an irregular channel with somewhat smaller dimensions was produced.
Also, experimentally tested
with high explosives was the concept of excavating a canal in sections
with the last section not throwing large quantities of material back
into the previously excavated section.
Row Charge Excavation.
One of the phenomena of row charges is shown in the
ground level view of a row charge experiment in which 18 one-thousand-pound
nitromethane high explosive charges were detonated simultaneously in a 1963
Plowshare program experiment at the Nevada Test Site. Note the virtual lack
of throwout at the ends of the channel. This phenomena would be quite important in the construction of canals,
Post-Scooter
'
In conjunction with the post-Sedan activities, a drilling program
was conducted at the Project Scooter (0.5 kiloton high explosive experiment in 1960) crater, which is close to the Sedan crater in order
to map the true crater boundaries. Comparison of true crater bound724-S25—-64——2