Tunnel anchor drilling rig is a kind of equipment specially used in tunnel and underground engineering, which is used to install anchors to provide support. Here are some main contents about tunnel anchor drilling rig:

　　1. Purpose

　　Tunnel anchor drilling rig is mainly used for initial support and reinforcement of tunnel. By drilling holes in the tunnel wall and installing anchors, the stability of the tunnel structure can be improved, and landslides and rock displacement can be prevented.

　　2. Working principle

　　Tunnel anchor drilling rig drives the drill tool through a hydraulic or electric system to drill holes in the tunnel surrounding rock. After the drilling is completed, the anchor is inserted into the hole and fixed in the rock layer by grouting or mechanical locking, thereby playing a supporting role.

　　3. Classification

　　Tunnel anchor drilling rigs can be divided into the following categories according to the power source and usage scenario:

　　- Hydraulic anchor drilling rig: driven by a hydraulic system, suitable for most tunnels and underground projects.

　　- Electric anchor drilling rig: driven by electricity, suitable for engineering scenarios with sufficient power supply.

　　- Handheld anchor drill: suitable for working in narrow spaces, easy to operate, but relatively small in power.

　　4. Features

　　- Efficient construction: can quickly and accurately drill holes on the tunnel wall and install anchors, improving construction efficiency.

　　- Adapt to different geology: can work in rocks and soils of various hardnesses, adapting to different tunnel geological conditions.

　　- Precision drilling: ensure the accuracy and verticality of the drilling, and ensure the installation quality of the anchor.

　　- Flexible operation: many tunnel anchor drills have flexible operating arms that can cope with different angles and position requirements.

　　5. Application scenarios

　　- Initial tunnel support: reinforce the tunnel wall by installing anchors to improve the stability of the tunnel.

　　- Tunnel reinforcement and repair: when problems occur in existing tunnels, anchor reinforcement operations are carried out.

　　Tunnel anchor drills are widely used in the construction of railway and highway tunnels, especially in rock tunnels, playing a key support role. It is also used in the reinforcement construction of underground spaces such as mine tunnels, underground parking lots and subway projects.