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US 9,382,796 B2Granted
Cartridge for tunnel blasting
AssigneeKorea Railroad Research Institute
InventorDong Hyeon Kim
Life of this patent
Estimating the term…
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.
Claims7
A cartridge for tunnel blasting, which is inserted into a bore hole formed in a rock, comprising:
- an inner tube containing water;
- an outer tube provided on an external side of the inner tube;
- a cap sealing ends of the inner and outer tubes;
- a nitrogen injection line provided to penetrate through the cap and inject liquid nitrogen which can freeze the water into a space formed between the inner and outer tubes;
- and
- a nitrogen discharge line provided to penetrate through the cap and discharge nitrogen in the space formed between the inner and outer tubes.
3 more elements
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 an internal side of the wedge device,
- wherein the cartridge comprises :
- an inner tube containing water;
- an outer tube provided on an external side of the inner tube;
- a cap sealing ends of the inner and outer tubes;
- a nitrogen injection line provided to penetrate through the cap and inject liquid nitrogen which can freeze the water into a space formed between the inner and outer tubes;
- and
- a nitrogen discharge line provided to penetrate through the cap and discharge nitrogen in the space formed between the inner and outer tubes.
7 more elements
Dependencies are inferred from the claim text.