FIELD: mining industry. SUBSTANCE: drilling rig has base, guides, carriage moved along guides by means of feed mechanism. Movable swivel head is located between guides and attached to carriage for locking in working position by means of threaded joint and displacement to the side from hole axis with the aid of displacement mechanism with lever. Lever is found from inner side of guide hinged to it with its one end and has gripping member on the other end. Swivel head surface has projection square to plane of swivel head plane for interaction with lever gripping member. EFFECT: higher efficiency. 4 cl, 9 dwg
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