학술논문
Controlling factors in reducing air blast, flyrock
Document Type
Periodical
Author
Source
Pit & Quarry. March, 1993, Vol. 85 Issue 9, p56, 1 p.
Subject
Language
ISSN
0032-0293
Abstract
The equation Pf/Toe Burden = Spacing is used to compute for the spacing of front row holes that it is located along the reference line. Holes can be precisely located relative to the other holes if the distance between them are properly computed. It is common practice that subdrilling be 30% of the holes' burden. Drillers should keep a comprehensive drill log and noting if there are abnormalities in holes. Records are kept because geological irregularities are crucial in proper loading. Incorrect loading cause air blast and flyrock.