Secondary fastening device for anchor rod of coal mine driving working face

• Main Authors: WANG YUEWEI, ZHANG XI, FU WENGANG
• Format: Patent
• Language: Chinese; English
• Published: 04.01.2022
• Subjects: EARTH DRILLING; FIXED CONSTRUCTIONS; GALLERIES; LARGE UNDERGROUND CHAMBERS; MINING; SHAFTS; TUNNELS

The utility model discloses a coal mine driving face anchor rod secondary fastening device which comprises a plurality of rod bodies, an upper stiffening plate and a lower stiffening plate are arranged at the upper end and the lower end of each rod body respectively, the lower stiffening plate extends downwards to be provided with a connecting sleeve, a cavity with taper is formed in the connecting sleeve, the large end of the cavity is arranged on the lower portion, and the small end of the cavity is arranged on the upper portion. The upper stiffening plate extends upwards to be provided with a boss, the boss is matched with the taper of the cavity, different rod bodies are clamped and spliced through matching of the boss and the cavity, pin holes are formed in the side walls of the connecting sleeve and the boss in a penetrating mode, and cylindrical pins are inserted into the pin holes so that the bosses located on the different rod bodies can be tightly connected with the connecting sleeve. A mounting bas