What is a rock screw?
rock screw is a key tool for construction companies working with rock, stones and other dense natural materials. These long screws are most often used in building and strengthening tunnels and working to increase the stability of the structure. With a unique physical appearance and three specific types of anchoring, the rock screw is one of the most commonly used anchorage techniques around the world.
The origin of the rock screw is unknown, but it is assumed that it came with mining companies in the end of the 18th century. The first documented use of rock screws was in the 18th century in the Saint Joseph mine in the United States. Since then, these screws have switched to worldwide recognition and have evolved into sophisticated techniques for building tunnels and more.
The rock screw comes in many styles and lengths, but usually has at least 13 feet (4 m) length and about thumb (25 mm) circuit. The screws transmit pressure from the unstable face of the rock structure to its more stable core to makeprevented the cave. The screws are usually designed from steel due to the capacity of metal to receive a large amount of stress and pressure. In addition, rock screws are used together in different samples to better secure the rock and prevent its collapse. Different patterns have been developed for various rock formations and various needs.
Before it is possible to create a formula, the opening must first be created. The rock screw is not inserted directly into the raw rock, as it would damage the screw structure. Instead, it has an anchor of the rock screw before the hole is inserted. Rock screws are used to anchor the surrounding rocks and the process uses one of the three main types of anchors, either mechanical, grouting or friction.
Mechanical rock anchors are the most common type of rock screw. In fact, these long rods are expanding in the hole when they are twzase in order to activate the mechanism. This mechanism increases its size and assuranceIt is convenient to customize that can be calculated to remove the pressure from the rock surface.
Injecting rock screw uses a standard piece of steel as an anchoring mechanism, but has no mechanical ability to spread in the hole. Instead, the rod is inserted and then surrounded by cement binding. After the grout solidifies, the screw is fused with the rock and releases its stress.
friction rock screws are newer technology in rock anchoring. The screw produces the radial force against the hole for the hole and prevents the rod from slipping. This allows less clutter and less time than the joint and has less chance of a mechanical error than the mechanical screws.