A borehole stemming apparatus

Abstract

This utility model discloses a borehole plugging device, including a plugging component with a hollow cavity and a T-shaped rod used in conjunction with the plugging component. The outer wall of the plugging component is designed with a conical structure, the bottom of the plugging component is sealed, and the top is open. A column is fixed at the bottom of the hollow cavity, and multiple sets of limiting blocks are arranged circumferentially on the outer wall of the column, with an insertion guide slope at the upper end of the limiting blocks. A fastening threaded section is protruding on the outer wall of the plugging component, which fits against the outer wall of the plugging component and extends downward. The lower end of the T-shaped rod is provided with an insertion groove adapted to the column and the limiting blocks. By providing a fastening threaded section on the outer wall of the plugging component, and rotating the plugging component in conjunction with the T-shaped rod, the thread of the fastening threaded section forms a mechanical engagement with the borehole wall, significantly increasing axial resistance, improving pull-out strength, and effectively preventing the plug from being pushed out during blasting.

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