| 摘要 |
PURPOSE: A method for making stratification or cracks of concrete and rocks is provided to reduce noise and vibration since cracks can be artificially formed on a desired part in a desired direction. CONSTITUTION: A method for making stratification or cracks of concrete and rocks comprises following steps. A hole for blasting the rock is punched. A split inner pipe(11) is installed inside the hole for blasting the rock according to split direction by the crack direction. The split inner pipes are filled with a fixed amount of gunpowder(13). A front closing part is filled up. The gunpowder is exploded. |
