Explosive Booster Planar Wave Generation
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Solution Overview
Problem
Conventional explosives boosters generate inefficient spherical detonation waves, leading to slow initiation and low detonation pressure, which hinders the effective initiation of main explosive charges in mining and construction blasting, especially when pentolite boosters are not available due to cost or regulatory issues.
Innovation Solution
A cylindrical booster with a non-explosive internal member, such as a frusto-conical shape, is used to alter the detonation wave from spherical to planar, enhancing the energy release by decelerating the central portion of the wave, thereby increasing the surface area and velocity of the detonation wave, ensuring efficient initiation of the main explosive charge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a conventional spherical detonation wave is used in a booster, then the booster structure is simple, but the initiation efficiency is low due to slow energy release and low detonation pressure
Solution Approach 1:
A non-explosive planar wave generator member is introduced as an intermediary element within the explosive substance of the booster. This member acts as a mediator to convert the spherical detonation wave from the detonator into a planar detonation wave, thereby improving initiation efficiency without requiring complex external structures or machining operations
Solution Approach 2:
The shape of the detonation wave is changed from spherical to planar by incorporating the non-explosive planar wave generator member. This parameter change in wave geometry fundamentally alters the detonation characteristics, increasing the surface area of the detonation front and improving the rate of energy release and initiation efficiency
2Productivity
If pentolite boosters are used to achieve high initiation efficiency, then the detonation pressure and energy release are sufficient, but the cost and regulatory restrictions increase
Solution Approach 1:
The invention replaces expensive pentolite boosters with a more economical booster design that uses common explosive substances combined with a simple non-explosive planar wave generator member. This substitution achieves comparable initiation efficiency at lower cost and without the same regulatory restrictions
Solution Approach 2:
The booster employs a composite structure combining explosive substance with a non-explosive planar wave generator member. This composite approach leverages the explosive properties of the explosive material while using the geometric properties of the non-explosive member to control wave shape, achieving high initiation efficiency through material and structural combination rather than relying on expensive explosive formulations
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The planar detonation wave initiates the main charge over a wider surface, reducing the run-up distance and resulting in faster and more efficient energy release, improving overall explosive output and reducing the need for high-cost pentolite boosters.
Implementation Method 1
a non-explosive member is provided internally of the explosive substance, the member being configured to alter the shape of a detonation wave travelling therethrough
Implementation Method 2
the booster comprising a body which includes an explosive substance and is configured to receive a detonator for initiating the explosive substance
Data Source
AI summary
An explosive booster shaped to fit into a blasthole adjacent a main explosive charge is provided. The booster comprises a body containing a charge of an explosive substance with a passage extending inwardly of the body to receive a detonator therein. The booster is configured to alter the shape of a detonation wave generated upon initiation of the detonator. In an embodiment, the booster includes a first and a second explosive substance, with the first explosive substance being shaped and selected to cause an outer portion of the detonation wave to accelerate relative to the remainder of the wave thereby altering the shape of the wave from a generally spherical wave to a generally planar wave. In an embodiment, the booster includes an internal member capable of altering the shape of the detonation wave.