FIELD: mining industry; mineral hydraulic borehole mining. SUBSTANCE: the offered lower head of hydraulic borehole mining tool has branch pipe for supply of pressure water. Branch pipe has hydraulic giant nozzles and accommodates pulp line branch pipe. Installed in annular space between above-indicated branch pipes is swirler of pulp flow. Swirler is made in form of, at least, one tangentially directed port in pulp line branch pipe hydraulically interconnected in pair to form, at least, one spiral channel for tangential introduction of swirling agent from annular space to pulp line branch pipe. EFFECT: higher efficiency. 4 dwg
| Title | Year | Author | Number |
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