1. Definition and structural composition of anchor rods

An anchor is a tension member that penetrates deep into the strata. One end is connected to the engineering structure and the other end is deep into the strata. From a structural perspective, there must be several key factors to form an anchor: first, a rod body with a higher tensile strength than a rock and soil body, which is the core part of the anchor body. It is usually made of high-strength steel. The anchor rod body produced by Lanyuan Technology is made of high-quality steel. After advanced technology processing, it has excellent tensile strength and yield strength, and can stably withstand horizontal and vertical loads in complex underground environments; secondly, one end of the rod body needs to be in close contact with the rock and soil body to form friction. Secondly, one end of the rod body needs to be able to make close contact with the rock and soil body to form friction. (or bonded) resistance is a common way to achieve it by using anchoring agent. The anchoring agent is the main material for fixing the anchor, and is closely combined with the rock and soil body, connecting the anchor and the rock and soil body into a solid whole, thereby realizing the reinforcement of the anchor; finally, the rod body is located at the other end of the outside of the rock and soil body, to form radial resistance to the rock and soil body, which is generally achieved by installing a pallet. The pallet is used to fix the head of the anchor and transmit tension to ensure that the anchor can effectively exert force on the rock and soil body. .​

2. Working principle of anchor rod

The working principle of the anchor is based on its unique structural design and mechanical characteristics. The entire anchor rod is divided into free section (force transmission section) and anchor section. The function of the free section is to apply prestress on the anchor rod. When the anchor rod is subjected to external force, the free section transmits the tension at the anchor head to the anchor body. The anchoring section is the area where the cement slurry bonds the prestressed tendons to the formation. Its important function is to increase the bonding and friction between the anchor and the formation, increase the pressure bearing capacity of the anchor, and thus transmit the tension from the free section to the depths of the rock mass. In this way, the anchors use prestressing to fix the underground rock mass together to form an integral structure. When the anchor is subjected to tension, the longitudinal tension of the rod body can overcome the disadvantage that the tensile ability of the rock and soil body is far lower than the compressive ability, effectively limiting the deformation and displacement of the rock and soil body. At the same time, the prestressing effect of the anchor can also increase the conjugation and internal friction angle of the rock and soil body. From a mechanical point of view, it mainly improves the conjugation and internal friction angle of the surrounding rock body, greatly strengthening the bearing capacity of the rock and soil body itself, thereby ensuring the stability of the engineering structure.​

3. The important role of anchor

Mine tunnel support: In underground mines, the stability of the tunnel is related to the life safety of miners and the smooth progress of production operations. Anchor rods are the most basic component of the support of contemporary coal mine tunnels. They bind the surrounding rocks of the tunnels together, so that the surrounding rocks themselves have the ability to support themselves, effectively prevent the collapse of the surrounding rocks of the tunnels, and create a safe working space for miners. The anchors produced by Lanyuan Technology are widely used in major mining tunnel support projects with their stable quality and reliable performance, providing solid guarantees for mine safety production.​

Civil Engineering Reinforcement: In addition to the mining field, anchors also play a key role in many aspects of engineering technology. For example, in slope projects, by installing anchors, the tension can be effectively resisted by geotechnical pressure, water pressure or wind load, and transmitted to deep stable rock and soil layers, prevent slope deformation and instability, and protect the safety of surrounding buildings and personnel; in tunnel construction, anchors can improve the stress state of tunnel surrounding rock, and be used in combination with jet concrete, significantly improve the stability of tunnel surrounding rock, and ensure the safety of tunnel construction and subsequent operations; in dam reinforcement projects, anchors can also enhance the stability of dam structure, resist various external forces, and ensure the safe operation of dam body.​

Since the German Sherez Mine first used anchors to support underground tunnels in 1912, anchor support has been widely used in civil engineering (including mining engineering) due to its simple structure, convenient construction, low cost and strong adaptability to engineering. Taking my country as an example, a large number of anchor rods (cords) are used in the construction of the Three Gorges Project dam to maintain the excavated slopes and rock walls; in coal mine mining, the newly excavated anchor spraying support wells and lanes are thousands of kilometers each year.​

As an enterprise focusing on the research, development, production and sales of underground tunnel support and ground tunnel support products for mining, Lanyuan Technology has always been committed to providing customers with high-quality anchors and related support products. The company has an advanced fully automatic intelligent production line, strictly controls the production process, and ensures that every anchor rod meets high-standard quality requirements. In the future, with the continuous progress and innovation of technology, the application of anchors in the mining and engineering fields will become more extensive and in-depth, and Lanyuan Technology will continue to give full play to its own advantages and contribute more to the development of the industry.