The KJ321 hydraulic tunneling drilling rig is engineered for drilling tunnels with cross-sections ranging from 12-45 m². It performs vertical, inclined, and horizontal drilling operations, including blast hole drilling and rock bolting.

• Flexible Drilling Boom: Features two symmetric rectangular coordinate booms with 360° rotation and self-leveling beam for precise positioning. Ideal for lateral cross-cut and rock bolting operations.
• Operator-Friendly Layout: Balanced chassis with articulated four-wheel drive provides excellent visibility and maneuverability for safe operation in confined tunnel spaces.
• High-Frequency Impact Drill: Stepped piston design delivers high-frequency impact for efficient rock drilling, increasing speed while reducing tool wear.
• Wide Operating Space & Automation: Spacious work area with automated functions enables operators to focus on precise, efficient, and safe drilling operations.
• Maintenance Friendly: All components are strategically placed for easy access and maintenance, ensuring long-term operational reliability.

• Underground tunnel excavation for mining, metro, highway, and railway projects
• Drilling operations in confined or complex tunnel environments
• Rock bolting and stabilization in underground construction projects