What is an underground bolting jumbo and how does it work?
Rock bolting is the ground-support cycle that makes an underground heading safe to work in: drill a hole, insert a bolt (split-set/friction or resin-grouted), and tension or set it so the roof and walls hold together. Done by hand it is slow and exposes the crew at the face; a bolting jumbo mechanises the drill-and-install sequence from a carrier positioned for the roadway section.
The FULONGZUAN CYTM41/2 is an underground hydraulic bolting jumbo for roadways 2.2–3.5 m. Its telescopic magazine carries six bolts of 1.5–2.0 m, and position/angle sensors drive automatic drilling and rod changing — the machine cycles through the bolt pattern with the consistency ground support depends on, and supports both expansion-shell and resin bolts.
Key Specifications
Key specifications from the manufacturer's catalogue: Specification from the manufacturer's intelligent mining equipment catalogue.
| Item | Specification |
|---|---|
| Machine | CYTM41/2 underground hydraulic bolting jumbo |
| Roadway range | 2.2–3.5 m |
| Bolt magazine | Telescopic, 6 bolts |
| Bolt length | 1.5–2.0 m |
| Bolt types | Expansion-shell (split-set type) and resin bolts |
| Drilling control | Electric pilot hydraulic drilling with anti-jamming device |
| Automation | Position/angle sensors; automatic drilling and rod changing |
Main Features
Three engineering choices carry the design. The telescopic 6-bolt magazine keeps a full pattern's bolts on the machine, so support cycles are not broken by re-loading trips. The electric pilot hydraulic drilling with an anti-jamming device protects the drill string in fractured ground — the ground that needs bolting most is also the ground that jams steels. And sensor-guided positioning (position and angle sensors feeding automatic drilling and rod changing) makes bolt spacing and angle repeatable across the pattern, which is what the support design assumes.
Supply & Trade
FULONGZUAN equipment is manufactured by Fujian Yizuan Machinery Co., Ltd. (Longyan, Fujian, China), a national high-tech enterprise holding 128 authorized national patents. Export enquiries are handled by the Simiai Technology trade desk: hemingwang@simiai.top, WhatsApp +86 130 7787 8567 (https://wa.me/8613077878567). Pricing, order quantities and delivery terms are quoted per enquiry (RFQ) against the buyer's target specifications.
Frequently Asked Questions
What roadway sizes does the CYTM41/2 cover?
Roadways of 2.2–3.5 m, installing bolts of 1.5–2.0 m from its telescopic 6-bolt magazine — the compact-to-mid section range typical of narrow-vein and small-mine development.
Which bolt types can it install?
Both expansion-shell type bolts and resin bolts, so the mine can keep its existing support standard when mechanising.
How does the anti-jamming device help?
Bolting ground is often fractured; when a drill steel starts to bind, the anti-jamming function reacts before the string locks solid — reducing lost steels, lost holes and cycle delays.
Conclusion
A bolting jumbo turns ground support from the slowest manual cycle into a mechanised, sensor-guided pattern. For 2.2–3.5 m roadways, the CYTM41/2 is the FULONGZUAN specification to evaluate — request an RFQ with your roadway dimensions and bolt standard.
Contact the trade desk
Pricing, minimum order and delivery terms are quoted on request. Send your target specifications to the trade desk for a quotation.