WebSep 11, 2024 · Powder factor was one of the first blast design technologies. At the time, it was not considered a good design method, but one that could get blasting started at a project. The blasters and engineers later took over and modified powder factor to work better as they collected data. WebMar 1, 2024 · All these blasts were performed using the same blast parameters such as drilling pattern, diameter, stemming, explosive average density and powder factor. Benches with similar geological and geotechnical properties, with Work Indexes varying from 7.7 to 14.2, were divided in two areas, one charged with watergel and another charged with the ...
6.3.1: Bench Blasting ABC 123: Testing Site / Course
WebJun 11, 2024 · The Blasting Through the Ages series is an initiative by Pit & Quarry and Academy Blasting to tell the story of the blasting world. Throughout the ages, great blasters and engineers revolutionized blasting to the science and art used today. ... While innovations such as clay tamping (stemming) and powder factor were developed, the … qube learning ceased trading
Evaluating the effectiveness of powder factor : Pit & Quarry
WebBlasting powder definition, a form of gunpowder made with sodium nitrate instead of saltpeter, used chiefly for blasting rock, ore, etc. See more. WebFeb 1, 2024 · The powder factor, q, (kg/m 3), can be estimated by: (3) q = a 1 × BI + b 1 where a 1 and b 1 are empirical coefficients depending on the diameter of the blast hole and the bench height. Lilly’s blastability index was initially developed to classify all the rock mass types present in the iron ore mines of the Pilbara area in northwest ... WebThe type of blasting most commonly used in a mine, as distinct from development, trim, presplit, ramp or other special blasts. Powder Factor. The quantity of explosives per unit volume or unit mass of rock. Typically … qube lcl availability sydney