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The process involves controlling the frequency content by adjusting delay times within a blast containing several explosive charges. InstantelвЂ™s Signature Hole AnalysisSignature Hole Analysis is a modeling technique used to help control blast induced vibrations.

Signature Blast Analysis and Ground Vibration Simulation Software:.

In areas where the damage to the rock was not sufficient to create fragments, the strain wave continues its trajectory until it runs out of energy that it dissipates by makingВ the rock vibrate.

The fragments adopt a ballistic trajectory.The pressure of these gases applied to the face ofВ the fragments, produces forces that propel the fragments.Gas pressure is reduced via the cracks thus separating the rock fragments.This damage isВ the center ofВ the cracks in the rock.This strain field, due to its impulsion aspect, creates a strain wave that is propagated in the rock and damages the rock.The gases are applied to the borehole which contains them and this creates a strain field inВ the rock.The charge explodes and is split up into high-pressure, high-temperature zones.The effects of an explosion (blast) are as follows: Here is an interesting bit of deep technology from the article.

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Software for Mining and Mines Safety System:ДЄn article on the new software and on the associated technologies of blasting and fragmentation is to be found at this link, a paper from the September 2008 issue of International Mining. List of Technical Papers / Presentations.

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