In tunnel engineering, the tunnel construction anchor drill is a key equipment to ensure the stability of surrounding rock, directly affecting support quality and construction safety. From soft rock to hard rock, different geological conditions have significantly different performance requirements for tunnel construction anchor drills . This article analyzes the core functions and selection points of tunnel construction anchor drills to help you match highly adaptable equipment.

1. Core Role of Tunnel Construction Anchor Drill: "Safety Barrier" for Surrounding Rock Support

The tunnel construction anchor drill transforms surrounding rock into a "self-supporting structure" through integrated operations of drilling, grouting, and anchor installation. In soft rock tunnels, high-frequency support is required (1 cycle every 5 meters), and the efficiency of the tunnel construction anchor drill directly determines the construction period—efficient models can control the single-cycle time within 2 hours, 40% shorter than traditional equipment.

2. Key Performance Indicators of Tunnel Construction Anchor Drill

(1) Drilling Efficiency: For hard rock geology, the drill torque must be ≥3000N·m and the impact frequency ≥50Hz (e.g., Hengwang 8m anchor drill is suitable for hard rock scenarios); for soft rock, low-torque models can be selected to avoid over-excavation.

(2) Stability: The machine body must be equipped with a hydraulic leveling system to ensure the drilling verticality deviation ≤1°, meeting the "precision support standard" for tunnel construction anchor drills.

(3) Flexibility: The crawler design must adapt to narrow tunnel spaces with a turning radius ≤3 meters, satisfying the "small-space operation" requirement of tunnel construction anchor drills.

3. Selection Strategies for Tunnel Construction Anchor Drill in Different Geologies

(1) Soft Rock Tunnels: Choose drills with anti-jamming functions, which reduce surrounding rock disturbance by automatically adjusting the propulsion force (≤5kN). The tunnel construction anchor drill must be equipped with a low-speed and high-torque power head.

(2) Hard Rock Tunnels: Prioritize high-frequency impact drills with alloy drill bits. The impact energy of the tunnel construction anchor drill must be ≥150J to ensure rock-breaking efficiency.

(3) Fractured Zone Tunnels: Drills must have synchronous grouting functions, with immediate grouting reinforcement after drilling. The grouting pressure of the tunnel construction anchor drill must be stable at 2-5MPa.

4. Operation and Maintenance Specifications for Tunnel Construction Anchor Drill

(1) Daily Inspection: Check the tightness of hydraulic pipelines before starting the machine daily to ensure normal working pressure (recommended 18-22MPa), which is the basic maintenance requirement for tunnel construction anchor drills.

(2) Wear Part Replacement: Drill pipes must be inspected for wear after every 500 meters of drilling, and drill bit alloy teeth must be replaced immediately when ≥3 teeth are missing to extend the service life of the tunnel construction anchor drill.

Hengwang Group Anchor Drill : A Reliable Choice for Tunnel Construction

Hengwang Group specializes in anchor equipment research and development. Its 8m anchor drill is specially designed for tunnel construction, adapting to the operation needs of various tunnel construction anchor drills. The equipment adopts optimized hydraulic system technology, with dynamically adjustable power head torque and impact frequency, meeting construction needs in multiple geologies such as soft rock and hard rock. The machine body is equipped with crawler walking and hydraulic leveling devices, enabling flexible movement in narrow tunnels with stable drilling accuracy. Relying on the "four-dimensional integration" service system (training, maintenance, accessories, solutions), Hengwang provides full-cycle support for tunnel construction anchor drills to ensure efficient equipment operation.

Take Action Now: Leave your tunnel geological type and anchor depth requirements to obtain an exclusive selection plan for tunnel construction anchor drills. The Hengwang technical team will respond within 24 hours! The correct selection of tunnel construction anchor drills is directly related to project safety and efficiency. Hengwang Group empowers tunnel construction anchor drills with technological innovation, contributing to high-quality tunnel project advancement.