| 摘要 |
<p>The invention relates to a device for producing a drill hole in rock material. The aim of the invention is to allow a drilling fluid to be supplied to the drill hole in the rock material and the drillings to be reliably removed in a simple and economical manner. To achieve this aim, a device comprises a core drill bit (4) arranged on the drill string (1) and projecting from the diameter of the drill string (1) with its diameter. The drill string (1) is surrounded by a casing pipe (5) in at least the terminal zone behind the core drill bit (4), forming an interior (13) between the drill string (1) and the casing pipe (5). The device is characterized in that the casing pipe (5) has a larger diameter than the drill hole produced by the core drill bit (4) at least in the terminal zone behind the core drill bit (4) and that at least one pipe conduit (14, 18), such as a hose, is provided in the cavity between the drill string (1) and the drill hole (10) for supplying drill fluid and/or for supplying filler material, for example cement slurry, to the interior (13) between the drill string (1) and the casing pipe (5). The pipe conduit (14, 18) can be operatively connected to the interior and can be displaced together with the casing pipe (5) in the direction of the advancing depth of the drill hole (10).</p> |
