| 摘要 |
For rock stabilization in underground mining and tunnelling, a borehole plug is used which has a wedge body displaceable in the direction of the borehole mouth. Arranged on the wedge body is an elastic casing which is pushed over a tubular sliding wedge secured at the end and in the process is widened in such a way that it bears tightly against the borehole wall. This is achieved by the feed tube moving into the wedge body and displacing the latter as a result in the direction of the borehole mouth, because the tubular sliding wedge is secured via a protective tube surrounding the feed tube, while the wedge body can move through the tubular sliding wedge. A simple non-return valve is provided at the end of the wedge body. Here, the elastic casing bears tightly against the wedge body, which has radial bores which end in this area and lead into an axial blind bore which constitutes the connection to the feed tube. A static mixer is safely accommodated inside this blind bore so that uniform and reliable mixing of the two components of the filling and adhesive material is always guaranteed. <IMAGE>
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