Insane Underground Construction Machines You Won’t Believe Exist

Brace yourself for insane underground construction machines you won't believe exist. In this video, we're taking you deep beneath the surface to see some of the most incredible, high-tech machines working in tunnels, mines and underground construction sites. From battery-powered loaders and precision drilling rigs, to robotic tunnel builders and high-reach scalers, these machines handle massive loads, drill with pinpoint accuracy and build complex underground infrastructure like nothing above ground. You'll discover how automation, advanced engineering, and zero-emission technology are revolutionizing mining and civil construction, making underground work safer, faster, and more efficient. Prepare to be amazed by the power, precision, and sheer scale of these subterranean giants. HS2 tunnel boring machine. The HS2 tunnel boring machine story is one of the most extreme underground construction achievements happening today. Deep beneath cities and countryside, massive tunnel boring machines are carving the hidden pathways for the UK's High Speed 2 railway. These machines operate like underground factories, cutting through soil and rock while installing concrete tunnel linings at the same time. Working around the clock, they can advance up to 15 meters per day without disturbing life on the surface. In total, 10 tunnel boring machines are being used to excavate nearly 64 miles of tunnels between London and the West Midlands. Each machine can reach lengths close to 170 meters and weigh around 2,000 tons, making them some of the largest land-based machines ever built. Many of them carry names inspired by influential women and local history, adding a human element to this industrial-scale operation. Together, these machines are quietly shaping the future of high-speed rail beneath the ground. Sandvik DS422IE. Deep underground, where space is tight and conditions are extreme, the Sandvik DS422IE stands out as a next-generation construction machine built for serious ground support work. This battery electric cable bolter is designed to install long cement grouted cable bolts, reaching lengths of up to 25 meters, to stabilize tunnels and mining areas far below the surface. Instead of relying on diesel, it runs on advanced lithium iron phosphate batteries, allowing it to operate with zero emissions while drilling, bolting, tramming and grouting. One of its most impressive innovations is charging-while-drilling technology, which lets the machine recharge its batteries during normal drilling cycles, keeping operations moving without constant downtime. The onboard automatic cement mixer and cement silo further streamline the process by reducing manual handling and speeding up repetitive tasks. Altogether, the Sandvik DS422IE represents a cleaner, quieter, and more efficient approach to underground construction, showing how electric technology is reshaping work beneath the earth. Epiroc ESA-L. This mobile raiseboring rig is designed to drill large vertical and inclined openings that connect different underground levels in mining and tunneling projects. The Epiroc ESA-L can be set up directly inside underground drifts without the need for a concrete foundation, making it highly flexible in confined spaces. It is capable of drilling conventional raises reaching depths of up to 200m, along with boxholes and down-reaming holes up to 60m deep. The machine can operate upward, downward, or at angled positions between 60 and 90 degrees, allowing crews to adapt to complex underground layouts. Its precision drilling method keeps hole deviation extremely low, which is critical for safety and accurate excavation. By reducing the risk of mechanical problems such as ground freezing and maintaining consistent hole quality, the ESA-L improves productivity. This raise boring machine plays an important role in modern underground construction by enabling efficient, accurate connections between different levels in challenging environments. Komatsu ZB-21 Bolter. The Komatsu ZB-21 Bolter is a powerful underground construction machine built to install critical ground support bolts in hard rock mines and tunnels with precision and control. Designed as a small class underground bolting rig, it focuses heavily on operator safety and efficiency. One of its standout features is the ability for the operator to complete the entire bolting cycle from inside the enclosed cab, reducing exposure to unstable rock conditions. The machine installs bolts ranging from 5 to 8 feet in length, ...and offers a vertical reach of nearly 21 feet, providing full coverage of tunnel walls and backs. Its redesigned bolting head uses fewer moving parts, helping to shorten cycle times and improve reliability. Integrated systems like the screen handler and optional chemical injection enhance accuracy during installation. Komatsu also offers a battery electric version, the ZB21B, supporting cleaner underground operations. Altogether, the ZB21 showcases how modern bolting technology is evolving to be safer, smarter, and more sustainable underground. McLean GR5 Grader The McLean GR5 Grader is a purpose-built underground construction machine designed to keep haulage roads smooth and safe inside mines Unlike surface graders adapted for underground use, this machine is engineered specifically for harsh subterranean conditions. It features a heavy-duty articulated frame combined with six-wheel drive and a hydrostatic transmission, giving it strong traction and stability on steep underground ramps. Sized to operate in typical underground headings around 5 by 5 meters, the GR5 delivers the tractive effort and drawbar pull of much larger surface graders while fitting into tight spaces. Inside, the enclosed ROPS and FOPS-certified cab, CANBUS control system and joystick-operated blade controls allow precise grading with improved operator comfort and visibility. Built to handle rough ground, low ceilings and constant use, the GR5 plays a critical role in maintaining underground road networks. It shows how specialized engineering keeps underground operations moving efficiently and safely every day. Epiroc SmartRock D65 The Epiroc SmartRock D65 is a high-tech construction machine built to drill blasting holes with extreme accuracy on large mining and excavation sites. This intelligent down-the-hole drill rig is designed to handle demanding workloads, drilling hole diameters from 110 to 229 millimeters and reaching depths of more than 50 meters. Powered by a strong engine and advanced drilling systems, it delivers consistent results while maintaining stability on tough terrain. What really makes this machine stand out is its smart automation. The integrated rig control system uses a touchscreen interface to monitor drilling data in real time. Helping operators achieve precise hole placement and depth every time. Automated rod handling reduces manual work, while optimized engine and compressor management help lower fuel consumption and wear. Some versions can even operate autonomously, drilling entire patterns remotely under supervision. The SmartRock D65 shows how automation and intelligence are transforming modern construction and mining equipment. Sandvik DD212i. The Sandvik DD212i is an advanced underground construction machine built for precision drilling in tight spaces. This compact single boom jumbo is specifically designed for narrow vein and medium-sized drifts, where accurate drilling is critical. Equipped with the Sandvik Intelligent Control System architecture, the DD212i integrates automation, real-time data collection and scalable control systems to help operators drill more efficiently with fewer errors. Its SB20Y instrumented boom, featuring dual rollovers and a 1m extension, allows it to handle drilling faces, crosscuts, cable holes and bolt holes even in confined underground headings. The machine boosts productivity per blast while maintaining high safety and accuracy standards. Sandvik also supports operators with tools like Digital Driller, a simulator that helps crews train before heading underground. Combining compact design, intelligent automation, and precise drilling capabilities, the DD212i stands out as a cutting-edge solution for modern underground mining and tunnelling projects, redefining efficiency in narrow-vein operations. Fischer-BauBot The Fischer BauBot is a groundbreaking construction machine that brings robotics and automation to underground and tunnel projects. Developed by Bobot GmbH and now fully owned by the Fischer Group, this fully automated robot performs high-precision tasks like drilling, cleaning, marking and installing fasteners, all guided by digital build plans integrated with BIM systems. Its advanced LiDAR sensors create safety zones while allowing the machine to drill accurately into walls, ceilings and floors, reducing physical strain on workers and boosting productivity. In 2025, the BauBot set a Guinness World Record by drilling 3,717 holes in concrete within 24 hours, showcasing its endurance and precision. The robots have been deployed on major infrastructure projects, such as the Koralm tunnel in Austria and the Engelberg tunnel refurbishment in Germany, where they handled thousands of accurate holes high on tunnel walls. By combining automation, digital planning, and precision, the BauBot is redefining how underground and tunnel construction is carried out. Scamic LC Thor 135T. The Scamic LC Thor 135T is a heavy-duty underground construction machine built for tackling the toughest rock scaling tasks in tunnels and mines. Engineered by Normet, this scaler features a telescopic boom that reaches up to 13.5 meters, allowing crews to remove loose rock from tunnel roofs, walls, and faces safely and efficiently. Designed for tunnels up to 12 by 12 meters, it operates in a minimum working profile of 5 meters width and 3.2 meters height Operator safety and comfort are prioritized with a FOPS and ROPS certified cabin, excellent visibility, lift and tilt functionality, air conditioning, heated mirrors, and optional remote operation. The machine can be equipped with a drum cutter or hydraulic hammer, and extendable support legs enhance stability during high-reach operations. Powered by a robust diesel engine with low emissions, the LC Thor 135T delivers consistent performance even in demanding underground conditions. It is a vital tool for maintaining safe, productive tunnel and mining environments worldwide. Scooptrum ST-18SG The Scooptrum ST-18SG is a next-generation underground loader designed to transform heavy material handling in mines and tunnels. Part of Epiroc's Smart & Green series, this battery-electric load-haul dump machine is built for high-volume underground applications like block caving and stoping. Running on a 540kWh high-capacity battery, it delivers one of the longest runtimes in its class while reducing heat, noise, emissions and ventilation needs, creating a safer and more comfortable environment for workers. Equipped with Epiroc's rig control system, the ST18SG supports automation and remote operation, allowing operators to manage tasks from a distance and optimize fleet performance. Its zero-emission design not only enhances sustainability, but also lowers respiratory hazards underground. Combining power, efficiency, and cutting-edge control systems, the Scooptrum ST18SG sets a new standard for modern underground loaders, proving that electric machinery can handle heavy-duty tasks while boosting safety, productivity, and environmental performance in challenging subterranean environments. Becker MineTrans. The Becker MineTrans systems are advanced underground transport machines built to keep people, equipment, and materials moving safely and efficiently in tunnels and mines. Developed by Becker Warcop, these systems include floor-mounted and suspended rail vehicles, locomotives, monorails, and shunting machines powered by diesel, electric, or battery systems. Designed for complex underground layouts, MineTrans vehicles can handle steep grades, tight curves, and long distances, adapting to the specific needs of each site. Many models feature modern battery electric propulsion, offering reduced emissions, improved air quality, and energy-efficient operation. Advanced controls, IoT-ready systems, and energy recuperation technologies ensure safety and reliability during long underground shifts. With multiple power transmission methods, including rack and pinion, friction, toothed, and rope drives, MineTrans machines can tackle the toughest subterranean conditions while maintaining high productivity. Widely used in mining and tunnelling projects worldwide, these systems showcase how engineering innovation is transforming underground logistics, making transport safer, cleaner and more efficient than ever before. Komatsu WX-03 LHD. The Komatsu WX-03 LHD is a compact underground loader, built to tackle tight mining and tunnelling environments where space is limited, but performance is crucial. This 3-tonne class diesel-powered LHD is ideal for narrow-vein operations and confined headings, combining reliability, power, and manoeuvrability. It features a 74kW water-cooled engine, a 1.5 cubic metres bucket, And a tramming capacity of 3,000 kg, giving it impressive digging and hauling capability for its size. Safety and serviceability are central to its design, with a ROPS and FOPS certified cab, spring-applied brakes, interlocks, and ground-level access to key maintenance points. Customizable options like ejector buckets, fire suppression systems, radio remote control, and automatic lubrication allow the WX-03 to adapt to different underground challenges. Despite its compact dimensions, the WX-03 LHD handles ore, muck and materials efficiently, proving that small machines can deliver big performance. It's a prime example of engineering designed to excel deep underground while keeping operators safe and productive. Epiroc Flexiroc T30R. The Epiroc Flexiroc T30R is a powerful and versatile surface drill rig built for quarrying, civil engineering, and construction projects. This top hammer drill rig combines rugged performance with intelligent design, allowing operators to drill holes for blasting, anchors, foundations, and road construction with high efficiency. Its extended boom provides over 5 meters of reach and an 80-degree swing, enabling more meters drilled per setup and reducing downtime. The compact crawler design and low centre of gravity allow it to navigate uneven terrain while remaining stable during operations. Standard radio remote control lets operators stay at a safe distance, managing drilling, steering and tramming without exposing them to hazards. Optional rod handling systems further enhance safety and productivity. The T30R's Tier 4 engine with automatic RPM control ensures fuel-efficient operation while protecting tools. Combining reach, mobility and smart operation, The Flexiroc T30R demonstrates how modern drilling rigs deliver both performance and operator safety on demanding job sites. Klem KR-800-63E The Klem KR-800-63E is a state-of-the-art underground and civil construction machine built for precise drilling in tunnels, urban projects and confined spaces. Part of Klem's 806 series, it specializes in anchor holes, micropiles and tiebacks. Its zero-emission electro-hydraulic system uses a permanent magnet synchronous electric motor with up to 180kW peak output, and an on-board battery enables fully off-grid operation, reducing exhaust, noise and dust, ideal for underground or emission-sensitive sites. Operators control the rig via radio remote, safely managing drilling, tramming, and setup from a distance. The advanced hydraulic system with patented power sharing adjusts power automatically to match drilling conditions, enhancing efficiency. Integrated telematics collect machine and process data for fleet monitoring and preventive maintenance. Built on a crawler chassis with oscillating tracks, the KR8063E supports rotary, hydraulic hammer, and double-head drilling. Its versatility, precision and sustainability make it a leading solution for modern underground and civil construction. McLean 975 Bolter The McLean 975 Omnia Bolter is a next-generation underground construction machine designed for hard rock mining and tunnelling projects. This heavy-duty bolter installs rock bolts safely and efficiently across large headings while keeping operators out of harm's way. Built on a self-propelled four-wheel drive articulated carrier, it features an electric hydraulic control system with remote drive capability, allowing precise positioning, drilling and bolting. The 975 Omnia can handle multiple bolt types, including resin-injected, cement grout rebar, split set, and mechanical anchors, making it extremely versatile for different ground conditions. It offers a 3,000-pound deck payload, hydraulic positioning systems, Gen 3 drill feeds, and optional features such as high-reach decks, resin injection, battery power, or wide deck configurations. Able to drill and bolt from invert to invert, it provides superior coverage of tunnel walls and backs. Combining safety, adaptability and power, the McLean 975 Omnia is a complete ground support solution, showcasing how modern underground bolting machines push engineering and productivity limits.