R. Meyer J. Köhler A. Homburg Explosives

287 Slurrit
Skid Test
This test is intend to simulate a bare explosive charge accidently
hitting a rigid surface at an oblique angle during handling. An uncased
hemispherical charge, 254 mm in diameter, is dropped in free fall onto
a rigid target. In a second version, the charge swings down in a
harness on the end of a cable and strikes the target at a predeterminated
angle*).
Slurries
Sprengschlamm; bouillies
Slurries consist of saturated aqueous solutions of ammonium nitrate
(saturated ammonium nitrate solution at 20 °C = 68 °F contains about
65% NH4NO3) and other nitrates, which also contain additional
amounts of undissolved nitrates in suspension and fuels which take up
the excess oxygen of the nitrate; the structure of the nitrate solution
can be significantly effected by added thickeners (e.g., W Guar Gum)
and cross linking agents (e.g., borax). The most important fuel is
aluminum powder; Water soluble fuels such as glycol can also be
employed; the nitrates may also include nitrates of organic amines,
e.g. W Methylamine Nitrate (MAN).
Slurries may contain sensitizing additives (e.g. TNT; PETN, etc.);
sensitization can also be achieved by introducing finely dispersed air
bubbles, e.g. by introducing air-filled W Microballoons (in this form the
bubbles will not be compressed by static pressure). Sensitized slurries
can be cap-sensitive and may detonate even when the diameter of the
bore-hole is small; W Emulsion Slurries. Sensitized explosive slurries
in the form of cartridges can be utilized in boreholes of conventional
and large diameters. In addition, explosive slurries may be pumped
into large boreholes.
Addition of rock salt, which reduces the detonation temperature
(W Permissibles), may impart a certain degree of safety against firedamp
to the slurry explosives.
Slurrit
Trade name for slurry blasting agents distributed in Norway by DYNO;
W Slurries Slurrit 5 is cartridged in large-hole dimensions. Slurrit 110
and 310 are mixed on site and pumped into the borehole by special
trucks. Non cap sensitive, best initiation by cast booster.
density: 1.25 g/cm3 * Gibbs & Popolato, LASL Explosive property Data, University of California
Press, 1980.