Charging Device for Open Pit Mine Blasting
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Solution Overview
Problem
Existing methods for charging granular explosives in open pit mine blasting are inefficient, as they fail to accurately position the explosives, leading to poor blasting effects and increased dust due to the lack of support and positioning mechanisms.
Innovation Solution
A charging device with a charging barrel, trays, and a flexible interval gasbag system that inflates to support and compact the explosives within the blast hole, using a jacking mechanism and moving mechanism to ensure accurate placement and minimize dust exposure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If granular explosive is directly poured into the blast hole, then the charging process is simple and fast, but the explosive cannot be accurately positioned and the blasting effect deteriorates
Solution Approach 1:
The patent introduces an air interval bag as an intermediary component between the explosive and the blast hole wall. This bag is inflated to provide a support structure that holds the granular explosive in position, enabling accurate positioning without requiring complex charging equipment or procedures. The air interval bag mediates between the simple pouring method and the positioning requirement.
2Ease of operation
If granular explosive is directly poured into the blast hole, then the charging operation is convenient, but dust is generated and the working environment deteriorates
Solution Approach 1:
The patent applies preliminary action by pre-assembling the explosive in the charging barrel with the air interval bag and tray structure before inserting it into the blast hole. This preliminary assembly contains the granular explosive, preventing dust generation during the charging operation while maintaining convenience through the pre-packaged design.
3Reliability
If air interval charging is used to reduce peak pressure and over-crushing, then the blasting effect is improved, but the granular explosive cannot be properly supported and positioned
Solution Approach 1:
The patent employs dynamics by using an inflatable air interval bag that can be inflated to the required size and pressure to support the granular explosive. The dynamic inflation process allows the air interval bag to adapt to different blast hole sizes and explosive quantities, providing reliable support for air interval charging while maintaining operational simplicity.
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 solution provides accurate placement and compaction of explosives, reduces dust exposure during filling, and enhances the blasting effect by ensuring the explosives are in close contact with the blast hole walls, while also inhibiting toxic gas release.
Implementation Method 1
an air inlet is provided on the wire passing second hole to facilitate the inflation into the interval gasbag, and the air inlet is connected to the air pump via a inflation tube
Implementation Method 2
a spring is provided between the top plate and the mounting groove
Implementation Method 3
the cover plate is provided with a lifting mechanism for driving the pressing plate to lift in the charging barrel
Implementation Method 4
the granular explosive is directly poured into the blast hole
Data Source
AI summary
The present invention discloses a charging device and method for open pit mine rock perforation blasting within the mining technology domain. The charging device includes a charging barrel with a detachable cover plate at the top and a bottom opening, housing a tray for explosive material. A jacking mechanism on the tray's side surface aids in positioning. A flexible interval gasbag separates the explosive and tray, with a wire passing hole at its center connected to an air pump via an inflation tube. A pressing plate and lifting mechanism in the cover plate facilitate lifting within the barrel. Additionally, a moving mechanism on the blast hole's top relocates the charging barrel. This innovation addresses challenges related to the cumbersome positioning and filling of existing powder explosives in open pit mine rock perforation blasting.