Dual-Explosive Rock Fracturing Element with Controlled Impact Spreading
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Solution Overview
Problem
Existing rock-fracturing explosive devices dissipate blast energy away from the rock surface due to instantaneous dispersion of explosives upon impact, rendering them less effective for mining and avalanche control.
Innovation Solution
The use of a dual-explosive body system where a first explosive body spreads and compresses upon impact, followed by detonation of a second explosive body, which further spreads and detonates the first, enhancing shockwave propagation and rock fracturing, supported by a plastic carrier structure and elastomer envelope to control deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional cast explosive charge is used that disperses instantly on impact, then the explosive material is easily dispersed and distributed, but the blast wave is dissipated away from the rock surface reducing effectiveness
Solution Approach 1:
The explosive element is designed to spread and compress against the rock surface before detonation occurs. This preliminary spreading action ensures the explosive material is positioned optimally on the surface to concentrate the blast wave energy where needed, preventing energy dissipation while maintaining ease of dispersion through the controlled spreading mechanism
Solution Approach 2:
The invention changes the temporal sequence of dispersion and detonation parameters. By controlling the explosive to spread first (changing its physical distribution) and then detonate (changing its energy release state), the system achieves both easy dispersion and concentrated energy delivery, resolving the contradiction between these two requirements
2Area of stationary object
If the explosive element spreads rapidly on impact, then coverage area is increased, but detonation effectiveness is reduced due to energy dissipation
Solution Approach 1:
The explosive element performs preliminary spreading to achieve adequate coverage area on the rock surface before detonation. This sequence ensures the explosive material covers the necessary area while maintaining sufficient density and concentration to generate effective detonation power, resolving the trade-off between coverage and power
Solution Approach 2:
The invention implements a two-stage periodic action: first spreading (expansion phase) then detonation (energy release phase). This periodic sequence allows the explosive to achieve coverage area through spreading while maintaining detonation power through the subsequent concentrated energy release, preventing the inverse relationship between these parameters
3Productivity
If a dual explosive body system is used with controlled spreading, then rock fracturing effectiveness is improved, but device complexity increases
Solution Approach 1:
The explosive charge is segmented into a first explosive body and a second explosive body with different functions. The first body is designed for spreading and compression, while the second body provides detonation. This segmentation enables improved rock fracturing effectiveness through controlled sequence of actions while keeping each segment relatively simple in design
Solution Approach 2:
The invention merges two explosive bodies with complementary functions into a single integrated explosive element. The first explosive body handles spreading and compression, while the second handles detonation, combining their effects to achieve superior rock fracturing. This merging improves productivity while managing complexity through functional integration rather than separate systems
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
This configuration increases the effectiveness of rock fracturing and avalanche control by concentrating blast energy and promoting extensive crack propagation and pulverization of rock strata, outperforming conventional systems.
Implementation Method 1
an explosive element; said explosive element subjected to an initial spreading against a target surface on impact of said explosive element with said target surface
Implementation Method 2
said explosive element so constructed as to control the rate of spreading and compression against said surface prior to detonation
Implementation Method 3
said explosive element including a first explosive body and a second explosive body; said second explosive body detonating subsequent to said impact; said first explosive body subjected to secondary spreading and detonation
Implementation Method 4
promoting extensive crack propagation and pulverization of rock strata
Data Source
AI summary
A rock-fracturing mining explosive element; said explosive element subjected to an initial spreading against a target surface on impact of said explosive element with said target surface; said explosive element so constructed as to control the rate of spreading and compression against said surface prior to detonation.