| 摘要 |
<p>The present invention relates to an end junction type rock bolt comprising: a hollow body having a hollow inside to allow a fluid to flow in through a front end which is an inlet wherein fluid flows, whose part is pressed in a concave form in a circumferential direction whose pressed part is expanded by the fluid flowing in the hollow; a cap for a front end fixated and combined with a front end of the hollow body to connect an injection part to inject the fluid; and a rear end junction part to close a rear end of the hollow body by junction in order to prevent the fluid flowing in the hollow of the hollow body through the injection part from being leaked outside of the hollow body. The present invention has an effect of reducing time and costs to manufacture a rock bolt, by directly closing the rear end of a hollow body by welding without a separate cap in order to prevent a fluid flowing inside the hollow body of the rock bolt for the installation of the rock bolt from being leaked to the outside of the hollow body.</p> |
