| 摘要 |
FIELD: mining. ^ SUBSTANCE: device for drilling wells in loose mine rocks, which includes drive mechanism, shaft and screw working member made in the form of a cone, on which flanges are rigidly installed in the form of body of revolution of catenary line around its vertical axis, the upper outer diameter of which is equal to diameter of the well, with possibility of compaction of the well walls. ^ EFFECT: higher drilling efficiency of loosely bound mine rocks without removing the mine rock from borehole bottom. ^ 1 dwg |
