| 摘要 |
The invention relates to a moulten bath drilling method in order to carry ou t exact-size drill holes, especially drill holes having a large diameter, in rocks. According to the inventive method, the overburden melt is pressed int o the surrounding rock which is cracked open under the effects of the temperature and pressure and the drill hole is lined during drilling when th e melt solidifies. A drilling medium in the form of a melt containing a metal is fed into the bottom of the drill hole via a line system, whereupon the botto m of said drill hole is subsequently melted open and cut out. Preferably, a me lt that is made from magnetic metal is used. The invention also relates to a drilling device that is used to carry out said method and materials that are used in said method.
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