The present invention discloses a mining blasting drilling device, which comprises a frame, a drilling
machine top, a positioning frame, and a slide. A retractable cabin is installed on the frame, a pulling
rope is led downward from the side bottom of the retractable cabin, a retractable shaft is installed in the retractable cabin, and the retractable shaft rotates to control the length of the pulling
rope led to the outside of the retractable cabin. A driving cabin is installed at the bottom of the drilling
machine top, and a lifting seat is installed in the driving cabin. A positioning plate is hingedly installed at the end of the positioning frame. The lifting seat descends and pushes the positioning frame to rotate outward, so as to drive the positioning plate to move outward and fit against the inner wall of the drilled hole. The lifting drive
assembly can push the slide and
drill rod downward and cooperate with the rotation of the
drill rod to complete downward drilling. In the present invention, the pulling
rope is gradually retracted and extended, so that the drilling structure penetrates deep into the hole. The entire hole is drilled through multiple descents and drillings. The depth of the drilling is not limited by the length of the
drill rod, and the drilling depth can be directly controlled by the pulling rope, thereby improving the efficiency of the entire drilling process.