| 摘要 |
<p>The present invention relates to a cover device for protecting a blasting hole and, more specifically, to a cover device for protecting a blasting hole installed in a blasting hole vertically bored to blast rocks; thereby covering rock dust around the blasting hole to prevent the loss of the rock dust, minimizing the wetting of the rock dust by rainwater to facilitate tight loading in a stemming operation, and preventing the inflow of the rainwater into the blasting hole to prevent inconvenience of pumping stagnant water from the blasting hole in a charging process. The cover device for protecting a blasting hole installed in the blasting hole vertically bored to prevent the inflow of the rainwater comprises: a cap part embedded in the blasting hole to close an inlet while having a conical shape with a diameter gradually narrowed downward from the upper part; and a cover part extended outward from the top of the cap part while having a shade shape with a diameter gradually widened downward from the upper part.</p> |
