Effect of Discontinuity Orientation on the Success of Pre-Split Blasting
Konya, Calvin J.
Previous approaches to pre-split blasting theory have tended to concentrate on the mathematics of dynamic stress wave interaction, while only recognizing some interaction with quasi-static stresses induced by expanding gases in the boreholes. However, the decoupling used in pre-splitting is specifically designed to reduce dynamic effects to a level that a small degree of radial fracturing is created around the borehole which is emphasized and extended by quasi-static gas effects. It can thus be argued that the process has more in common with hydrofracture than with more conventional use of explosives. A research program was designed to test a simple analytical approach to pre-split blasting through an extensive model blasting program incorporating the use of both idealized material and rock, and an equally extensive field observation program and trials on pre-split highway cuts in Scotland. Conclusions from the work are given.
P. N. Worsey, "Effect of Discontinuity Orientation on the Success of Pre-Split Blasting," Proceedings of the Annual Conference on Explosives and Blasting Technique, International Society of Explosives Engineers (ISEE), Jan 1984.
Proceedings of the Tenth Conference on Explosives and Blasting Technique.
Mining and Nuclear Engineering
Article - Conference proceedings
© 1984 International Society of Explosives Engineers (ISEE), All rights reserved.