Underground Rock Bolt Drilling Operations for Tunnel Construction
The underground rock bolt drilling rig plays a critical role in modern tunnel stabilization processes. This specialized equipment performs precision drilling through rock formations to install systematic anchor systems that reinforce tunnel structures. Utilizing either hydraulic or pneumatic power systems, the drilling unit typically features a feed beam mechanism that enables controlled advancement of the rotary-percussive drill head. During operation, the rig's alignment system ensures accurate positioning of rock bolts according to engineering specifications, maintaining strict adherence to planned spacing patterns and installation angles. Post-drilling, the system facilitates simultaneous grout injection through hollow stem drill rods while withdrawing the bit, ensuring complete cement mortar filling in the annulus. Advanced models incorporate real-time torque monitoring and automatic feed pressure adjustment to accommodate varying geological conditions, significantly enhancing safety and efficiency in challenging underground environments. These operations are typically conducted in conjunction with shotcrete application, forming an integrated primary support system that mitigates ground movement risks during tunnel excavation phases.
Minimal Environmental Impact
Reduces surface disturbance compared to traditional support methods.
Controls ground settlement to protect nearby infrastructure.
SANROCK SRJ18 Underground Jumbo Drilling Rig Scope of application One-boom face drilling rig for medium sized underground drifts,
with coverage area 7-35m².
Main benefits
> Optimized: for small to medium size tunnels and drifts down to 2.4 m widex2.9 m high,
up to 6 m widex6 m high.
>Economical and efficient: with automatic drilling, automatic return and anti-jamming functions increased the service life of drilling tools.
> Intelligent: with function of real-time monitoring and evaluation of construction conditions by digital recording data of the number and depth of holes.
>Safe and simple operation: equipped with automatic diagnosis and voice alarm system. High popularity: and good after-sales service support.
Products Description
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Product name:jumbo drilling rig
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Model
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SRJ18
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Maximum Coverage Area(H*W)
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2.9*2.4m
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Minimum Coverage Area(H*W)
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6.3*6.5m
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Overall Dimension(L*W*H)
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11700*1800*2100/2900mm
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Weight
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13.6T
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Turning Radio Outer/Inner
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5600/3150mm
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Rock Drill Range
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Ф41-76mm
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Rock Drill Power
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18kw
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Rock Drill Rate
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60Hz
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Drill Rod
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T38-H35-R32-4305mm
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Hole Depth
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4000mm
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Diesel Engine
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Yuchai 66kw
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Main Electric Motor
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55kw
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Total Installed Power
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62kw
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Rock drill
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Shank
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T38
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Drill range
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41mm-76mm
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Reaming range
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76mm-4127mm
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Height over drill centre
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95mm
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Length without shank
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1008mm
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Impact power
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18kW
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Impact rate
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60Hz
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Rated hydraulic pressure
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210bar
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Maximum hydraulic pressure
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230bar
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Rotation system
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Separate rotation
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Rotation speed
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0~215rpm
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Rotation torque
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max 1000Nm
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Company Profile
1.What can you buy from us?
DTH drilling rig,Integrated DTH DTH drilling rig ,core drilling rig,highway pile driver,solar pile driver ,anchor pile driver,rotary drill rig ,Top Hammer drill rig,Underground jumbo drill rig ,DTH hammer,screw air compressor,screw air compressor,piston air compressor,pneumatic rock drill ,drill rod,drill bit,PDC drill bit,top hammer drill bit,tricone bit ,spare parts.
2.How can I make payment?
A:You can pay by credit card, TT, Western Union, LC etc.
3.How is the shipment? How long dose it take?
A: For large quantity or heavy products, we ship by sea shipping or land shipping. Shipping efficiency depends on country and city you want to ship to. For small and delicate products, we ship by DHL, UPS, Fedex or TNT. You can also appoint shipping method you like before we ship.
4.How is your quality control?
A: We have our own experienced QC. There will be strict inspection and testing for every order before shipping out.
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