Herrenknecht drilling systems: Efficient exploration and rock stabilization for underground construction.
High level of safety in demanding underground conditions.
Maximum safety at work for the personnel is an important factor in mechanized tunnelling. This is especially the case when advancing with open-mode tunnel boring machines in loose soil. Ensuring appropriate rock stabilization at an early stage ensures that tunnelling crews can work more safely and that the tunnelling machine is protected from falling rock.
By avoiding unnecessary stoppages, this also benefits the entire project flow. Even when tunnelling in heterogeneous soils with closed-mode machines, consistently high performance rates are essential for the success of the project. Accurate preliminary exploration of the subsoil is extremely important in maintaining these high rates of advance. Early detection of obstacles in the tunnel route or difficult geological zones warn the machine operator, allowing him to apply prompt countermeasures, such as introducing conditioning suitable for the ground conditions.
Special drill rigs for probe drilling and rock stabilization.
Herrenknecht Drilling Systems plans, designs and manufactures project-specificdrilling and roof bolting equipment for tunnelling and mining. The product portfolio encompasses integrated solutions for mechanized strata control and custom-built equipment. In mechanized tunnelling, our drilling systems allow fast, accurate installation of roof bolts directly behind the shield area. The probe drill assemblies enable exploration at up to 100 meters away from the tunnel face, ensuring an optimal starting position for any type of preliminary exploration for tunnelling. On request from our customers, we also design specific custom solutions, such as for conventional mining applications.
Systematic probe drilling.
Probe drilling equipment by Herrenknecht Drilling Systems are specially manufactured to customer requirements. They can be fitted with top-hammer, down the-hole-hammer and rotary drillheads. To provide optimal coverage of all drilling positions, all the indexing systems, travel units, hydraulic power units and controls for Herrenknecht drilling systems are developed in-house. This ensures that all drilling patterns in the rock are possible. Hydraulic cylinders or hydraulic motors deliver up to 12 metric tons of thrust. The high-quality aluminum sections guarantee maximum strength with minimum weight. For heterogeneous soils, Herrenknecht also supplies drainage and injection systems to stabilize ground with water pressure up to 40 bar. Special drill rods are sealed by rotary seals, while ball valves allow flushing of drilling water, drainage and injection. As an option, we can also supply simple or double hydraulic clamp guides, rod feed systems and rod magazines for our drilling systems.
A computer-aided system records and processes the drilling data collected in tunnelling in real time, and translates it into a geology report. This enables visualization of the encountered geology and guarantees safe tunnelling, even in heterogeneous soils.
Strata control in hard rock.
When advancing with open excavation machines, rock stabilization takes absolute priority to ensure the best possible protection of personnel and machinery. Herrenknecht Drilling Systems supplies roof bolting units suited for all machine types, including tunnel boring machines, mobile boring units and shaft drilling systems. Our rugged roof bolt drilling rigs are rigid or telescoping, according to requirements, and can be used in any geology. Their modular design allows the use of hydraulic, pneumatic or electric power with any rotary hammer drill or drilling motor.
The roof bolting systems are designed with custommade mounts and indexing mechanism and are matched to the machine and drilling processes. Wear parts are easily exchangeable, minimizing downtimes and optimizing maintenance costs. On request, we can also supply automated hydraulic rod extensions, hydraulic clamp guides and temporary rock support systems.
Project-specific custom solutions.
Herrenknecht Drilling Systems develops custom solutions to meet special requirements. Development, design, process technology, manufacture and customer service are all supplied from a single source. This allows us to implement extremely functional custom products, including blast hole drills,
mobile boring units and excavator mountable drills, with short delivery times.
