DIRECTIONAL SEISMIC EFFECT OF DISPERSED SINGLE-ROW BLASTS,
Abstract
The seismic effect of scattered charges, instantaneously detonated, has been investigated. Charges of equal weight were detonated in equally spaced holes arranged in a row. The number of charges in an array and the spacing between holes were varied, but the total weight of charges was kept constant. Effects of the charges were measured at various distances, and it was found that the seismic effect is lower along the extended line of charges than in a direction at right angles to it. The velocity of particle movement at points along the extended line was found to lie between a lower limit corresponding to one of the single charges in the spread and an upper limit corresponding to the total charge concentrated at one point. For points at right angles to the line of holes, at moderate distances, the particle velocity was found to be equal to or greater than that due to an explosion of the total charge at a single point. Change in velocity with distance produces a curve similar to that for concentrated charges. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 13, 1970
- Accession Number
- AD0703560
Entities
People
- B. G. Rulev
- D. A. Kharin
Organizations
- National Air and Space Intelligence Center