UMBRELLA-SHAPED ANCHOR FOR QUICK REINFORCEMENT OF ROCK MASS, AND APPLICATION METHOD

摘要

An umbrella-shaped anchor for quick reinforcement of rock mass, comprising a rock mass umbrella-shaped anchor head (1) and a connecting rod (2). The rock mass umbrella-shaped anchor head comprises a sliding mechanism (5), bearing blocks (6), a guide block (7), and an anchor head main rod (8); the anchor head main rod passes through a square hole in the middle of the guide block; the sliding mechanism is connected to the connecting rod by means of the anchor head main rod; the bearing blocks have the upper parts respectively inserted into grooves (11) of the guide block and are completely attached to guide rails (12) having a rectangular cross-section at the sides of the sliding mechanism; during installation, after the rock mass umbrella-shaped anchor head in a folded state and the connecting rod are extended into an anchor hole, the connecting rod is stretched to drive the sliding mechanism to compress the bearing blocks so that the bearing blocks expand outward and compress the hole wall. Also disclosed is an application method for the umbrella-shaped anchor. The umbrella-shaped anchor converts the pulling force of the anchor rod into a compression force against the rock mass, and obtains a large anchoring force by means of high compressive strength of the rock mass. The umbrella-shaped anchor has a large application depth, high construction speed, high efficiency, large structural resistance, and good stability, and does not need grouting.