What drill rigs work in narrow mine tunnels and underground exploration?
Drilling underground is a packaging problem before it is a power problem: the rig must pass the shaft cage or the tunnel profile, assemble in a chamber barely larger than itself, and still deliver controlled rotary drilling for exploration and engineering holes. That is why dedicated tunnel drill rigs — not derated surface rigs — exist.
The FULONGZUAN tunnel drill series is a fully hydraulic range for exploration in narrow underground spaces. The machine uses a compact, separable structure with an optional crawler, aimed at exactly that transport-and-assemble constraint, and is applied in mine tunnels as well as railway, water conservancy and tunnel engineering works.
Key Specifications
Key specifications from the manufacturer's catalogue: Configuration points from the manufacturer's exploration equipment catalogue.
| Item | Specification |
|---|---|
| Structure | Compact and separable for underground transport and assembly |
| Mobility | Crawler optional |
| Power unit | Electric motor pump station |
| Feed / rotation | Hydraulic rotary head with cylinder feed |
| Clamping | Disc-spring clamping, hydraulic release — safe, reliable, high force |
| Centring | Three-jaw automatic centring, accurate positioning |
| Applications | Mine tunnel exploration; railway, water conservancy and tunnel engineering |
Main Features
Two details define the series' underground manners. The clamp uses disc springs to grip and hydraulics to release, so clamping force is maintained by spring energy — a fail-safe arrangement that holds the string if hydraulic pressure is lost. And the three-jaw automatic centring keeps the hole collar aligned without manual shimming in a cramped chamber, which is where underground drilling time is usually lost. Electric motor pump drive suits underground power infrastructure and ventilation limits better than a diesel at the face.
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
Why not use a small surface rig underground?
Transport and assembly. A surface rig is one rigid machine; a tunnel rig separates into pieces sized for cages and narrow drifts, then reassembles at the chamber — with clamping and centring designed for confined, low-headroom work.
What powers a tunnel drill rig?
In the FULONGZUAN series, an electric motor pump station drives the hydraulic rotary head and cylinder feed — matching underground electrical infrastructure and avoiding diesel exhaust at the face.
Where else are tunnel drill rigs used?
Beyond mine exploration, the same compact format serves railway tunnels, water conservancy works and tunnel engineering investigation drilling.
Conclusion
For underground exploration, specify the rig around the opening it must pass through and the chamber it must work in. Send your tunnel dimensions and hole plan to the Simiai Technology trade desk for an RFQ on the FULONGZUAN tunnel drill series.
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.