What does anchoring mean? An anchor (English: Bolt / Rock Bolt) is a tension rod system that penetrates deep into the rock and soil layer. It is connected to the stable stratum through the anchor section and the other end is connected to the engineering structure (such as slope, tunnel lining, foundation pit enclosure), transferring the external load to the deep stable rock and soil. Its core value lies in using the strength of the stratum itself to achieve active support and overcome the defect of weak tensile resistance of rock and soil.

   Anchoring, the full name of "anchor support construction", refers to the process of drilling, installing anchors, grouting (or anchoring), etc., inserting anchors deep into the rock and soil, and using the tensile strength, shear resistance, friction and adhesion of the anchors with the rock and soil to connect the loose, broken or unstable rock and soil with the deep stable stratum to form an integral load-bearing structure, thereby limiting the displacement of the rock and soil and preventing collapse.

   Simply put, anchor bolting is like injecting a steel needle into a "weak" rock and soil mass. When the rock and soil's inherent strength is insufficient to withstand its own weight or external loads (such as stress release after tunnel excavation or lateral pressure from foundation pit slopes), anchor bolts act like tendons to "hold" the rock and soil in place, preventing deformation or collapse.

   Core Application Scenarios for Anchor Bolting

   1. Mining Tunneling: Preventing roof collapse and combining broken rock strata (over 57% usage rate).

   2. Slope Engineering: Landslide control, such as anchor bolt frame beam support for highway slopes.

   3. Foundation Pit Anti-floating: Balancing groundwater buoyancy, replacing traditional pullout piles (30% more economical).

   4. Primary Tunnel Support: Forming an "anchor-shotcrete support system" with shotcrete to control surrounding rock deformation.

   As a core process in geotechnical engineering, anchor bolting has become a pillar technology for modern underground engineering and slope management by scientifically transferring loads and activating the self-stabilizing capacity of the strata. Its continuous innovation (such as intelligent tensioning system and geological radar monitoring) will further promote the development of green support technology.