CONCRETE FRACTURING METHOD

摘要

PROBLEM TO BE SOLVED: To provide a concrete fracturing method for enabling the fracture of a concrete at its intended face without breaking into pieces a concrete portion under the hole bottoms of holes formed extending from one face of the concrete to the inside of the concrete.SOLUTION: In the concrete fracturing method by means of blasting, first holes (explosive loading holes 3) are formed in a concrete 1 to be fractured extending from one face 2 of the concrete 1 to the inside of the concrete, and a second hole (an intersecting hole 20) is provided in a concrete portion under the hole bottoms of the first holes and formed extending in a direction of intersecting the center lines of the first holes. Pressure is imparted to the inner faces of the first holes to fracture the concrete 1.