Cartridge for tunnel blasting

摘要

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.

主权项

1. 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.