| 摘要 |
Disclosed is a bedrock crack apparatus using a powder keg type ice explosive wherein a via hole is formed at a bedrock using a via hole apparatus, and a sealed tube filled with water and a liquid nitrogen is inserted in the interior of the via hole, thus causing cracks in the bedrock based on the principle where volume expands when water is frozen and easily cracking the bedrock. The above bedrock crack apparatus may include a packer which is fixedly inserted in the mouth of a via hole formed at a bedrock; an inner tube which is disposed at the packer and is filled with water; an injection device which is connected to the packer; a nitrogen injection nozzle which is installed at the injection device and passes through the packer; and a supply unit which is connected to the injection device to supply liquid nitrogen. |
