| 摘要 |
<p>A tool for shell or slab-splitting rocks or for wedging rocks in tunnels comprising a hydraulic/pneumatic cylinder (2) with an internal first piston (3), said first piston (3) being provided with a hydraulic/pneumatic pressure by supplying a fluid, preferably oil, through a supply conduit (1), and the power from the piston (3) is transferred to a wedging device comprising a wedge (10) which may be displaced between wedge holders (11, 12) being located in a drilled hole (13), the piston (3) being connected to a piston rod (7) which runs to a second internal piston (8) being located in a piston housing (6), the power from the first piston (3) being transferred to the second piston (8), for thereby pressing the wedge holders (11, 12) towards the surrounding rock, and creating a crack therein at the appropriate pressure wherein the wedge (10) is located parallel to the lengthwise axis and peripherally in relation to the hydraulic/pneumatic cylinder (2) is disclosed. A method for splitting rocks with this tool is also indicated.</p> |
