{"id":19141,"date":"2025-10-01T08:22:42","date_gmt":"2025-10-01T06:22:42","guid":{"rendered":"https:\/\/www.darda.de\/rock-tools"},"modified":"2026-04-07T07:48:02","modified_gmt":"2026-04-07T05:48:02","slug":"rock-tools","status":"publish","type":"page","link":"https:\/\/www.darda.de\/en\/knowledge\/rock-tools","title":{"rendered":"Rock tools"},"content":{"rendered":"
\n

Rock tools include all tools and hydraulic attachments used to process, split, separate, or convert natural rock into transportable units in a controlled manner. In practice, the spectrum ranges from non-explosive splitting to cutting and shearing embedded components, up to selective deconstruction at the interface between rock and concrete. Especially in sensitive environments – inner-city settings, existing tunnels, or areas of listed heritage structures – low vibration levels<\/em> methods are in demand. Here, hydraulic systems such as hydraulic rock and concrete splitters<\/a> or, additionally, concrete pulverizer<\/strong> come into play when concrete components or installations near rock need to be selectively removed. Compact dimensions, controllable force application, and the non-explosive working principle support predictable results and regulatory acceptance.<\/p>\n

Definition: What is meant by rock tools?<\/h2>\n

Rock tools are specialized tools and hydraulic attachments for the mechanical processing of rock. They generate controlled stresses in the rock to initiate cracks and release blocks along the desired cutting lines with predictable crack propagation. These include, in particular, rock and concrete hydraulic wedge splitters<\/strong> with rock splitting cylinders<\/em>, as well as cutting and shearing systems that can be used in mixed construction situations (rock\/concrete\/steel). The energy supply is typically provided by a power unit<\/strong> or suitable carrier hydraulics. Rock tools are used in the fields of rock excavation and tunnel construction<\/em>, natural stone extraction<\/em>, concrete demolition and special demolition<\/em>, strip-out and cutting<\/em>, and in special applications<\/em>. When combined with accurate drilling and a clean workflow, they enable repeatable, low-emission results.<\/p>\n

Design and operating principles of rock tools<\/h2>\n

Rock tools use mechanical lever, wedge, or shear principles to locally exceed the tensile strength of the rock. With hydraulic splitting technology, boreholes are drilled and rock splitting cylinders<\/strong> are inserted. A wedge extends, pushing two counter-bearings apart and generating radially acting forces that open the rock along natural or predefined planes of weakness. Cutting and shearing systems are used in addition where components embedded in the rock – such as reinforcement, anchor heads, or concrete stiffeners – have to be separated. hydraulic power units<\/a> provide the required pressure and flow; precise matching improves efficiency and reduces thermal and mechanical stress on the system. Clean boreholes and correct wedge geometry are decisive for reliable initiation and guidance of cracks.<\/p>\n

Hydraulic splitting technology<\/h3>\n

The splitting method is based on the wedge principle<\/em>. The prerequisites are boreholes with suitable diameter and sufficient depth. The splitting wedge generates high radial forces with very low structural vibrations – ideal in vibration-sensitive zones. Optimal borehole spacing, penetration depth, and sequence determine the achievable block geometry and cycle time. This method is particularly suitable for rock demolition and tunnel construction<\/a>, controlled natural stone extraction<\/em>, and special applications<\/em> such as rescue operations or work in ATEX zones where non-explosive approaches are preferred.<\/p>\n

Cutting and shearing principles<\/h3>\n

In transition zones from rock to structure, shearing or cutting tools are additionally used. Concrete pulverizer<\/strong> separate concrete components and facilitate exposing the rock when deconstruction is carried out in stages. Combination shears<\/strong> and Multi Cutters<\/strong> are useful when reinforcement, anchors, or other metal parts must be cut. Steel shear<\/strong> and tank cutters<\/strong> primarily belong to the domain of strip-out and cutting<\/em> but prove relevant whenever metallic installations or tanks in rock-adjacent excavations or drifts have to be removed. Jaw design, cutting force, and cycle times should be matched to material thickness and access conditions.<\/p>\n

Grabbing, breaking, and secondary breakage<\/h3>\n

After splitting, controlled secondary breakage is often performed to achieve transportable piece sizes. Through coordinated splitting sequences and, if necessary, reworking in secondary boreholes, block geometry can be purposefully controlled. Where concrete is present, concrete pulverizer<\/strong> support separate removal. Mechanical handling with suitable grabs and load management ensures safe extraction without overloading edges or supports.<\/p>\n

Typical rock tools and applications<\/h2>\n