Accession Number:

AD0648832

Title:

FURTHER STUDIES ON SYMPATHETIC DETONATION

Descriptive Note:

Report of investigation

Corporate Author:

BUREAU OF MINES WASHINGTON DC

Report Date:

1966-01-01

Pagination or Media Count:

39.0

Abstract:

Investigations were made into sympathetic detonation of ammonium nitrate AN and ammonium nitrate-fuel oil AN-FO to define the scaling law for safe separation from detonating AN-FO. Both missile- and non-missile-producing AN-FO donors, weighing up to 5,400 pounds, were employed with acceptors of the same size. The usual cube-root scaling law was not confirmed exponents for the relationship S fW exp x for AN were 0.51 with non-missile-producing donors and 0.61 for missile-producing donors. For AN-FO an exponent of 0.80 was indicated in the missile-producing case. AN-FO in polyethylene bags appeared somewhat more easily initiated than bulk AN-FO. The efficacy of barricades in protecting AN charges was investigated. Sympathetic detonation distances were reduced from one-third to one-seventh when sand-filled barricades were employed. The investigation was extended to boxed dynamite with both types of donors. With 1,600-pound missile-producing donors and an equivalent weight of dynamite, initiation would be expected in 50 percent of the trials at 167 feet. The corresponding value in the non-missile case was 67 feet. The data developed in this program of sympathetic detonation will allow the development of a rational set of safe separation distances for AN, AN-FO, and explosives.

Subject Categories:

  • Explosions

Distribution Statement:

APPROVED FOR PUBLIC RELEASE