The DR-B1 is a self-propelled underground hydraulic drilling rig engineered by Machine-Building Holding OJSC, a Russian manufacturer with a vertically integrated product line that includes its own hydraulic rock drills, drilling tools, and self-propelled underground machines. The rig is purpose-built for the mechanized installation of rock bolt support systems in underground mine workings with small to medium cross-sections up to 36 m².
Its chassis is shared with the company's DF-B1 development jumbo, streamlining spare-parts logistics and cross-training across a mixed fleet. Power is supplied by a high-efficiency electric-hydraulic oil station connected to a standard industrial mains network, eliminating diesel exhaust underground and reducing ventilation demand.
The working unit features a two-section telescopic boom with a combined drilling-and-anchoring module that maintains independent circuits for each function. At the heart of the module sits the RD314-МХ hydraulic rock drill — produced in-house by Machine-Building Holding — delivering 14 kW of impact power for borehole diameters of 33 to 43 mm.
A mechanized revolver-type anchor magazine enables continuous bolt cycling up to 3 m lengths without manual reloading, supporting all mainstream anchor types: self-setting (СЗА), wedge-split (КРА), hydraulic expansion (Swellex / ГРА), and steel-polymer (СПА). A dedicated mesh manipulator is included for safe, mechanized wire-mesh placement before bolting.
The machine fits tunnels as narrow as 3 × 3 m, drills a roof cross-section of 6,350 × 2,100 mm, and traverses gradients up to 15°, self-tramming to the heading at up to 12 km/h.
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