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US 2015/0102652 A1Published application
Cartridge for tunnel blasting
AssigneeKorea Railroad Research Institute
InventorDong Hyeon Kim
Life of this patent
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Abstract
A cartridge for tunnel blasting is provided a cartridge for tunnel blasting, which easily breaks a rock, by inserting a cartridge containing water into a bore hole formed in a rock by using a boring device, and injecting liquid nitrogen into the inserted cartridge, so as to induce cracks of the rock by using the characteristic of the water that expands when it is frozen.
Claims11
A cartridge for tunnel blasting, which is inserted into a bore hole formed in a rock, wherein water is contained in the cartridge, and liquid nitrogen which can freeze the water is inserted into the cartridge.
A tunnel blasting system, comprising
- a wedge device inserted into a bore hole formed in a rock;
- and
- a cartridge for tunnel blasting, which is provided in the internal side of the wedge device,
- wherein water is contained in the cartridge, and liquid nitrogen which can freeze the water can be injected into the cartridge.
1 more element
Dependencies are inferred from the claim text.