Used Underground Tunnelling machinery
Another name for a Underground Tunnelling Rig is a Drilling Jumbo. They are usually used in underground mining, if mining is done by drilling and blasting. They are also used in Underground Tunneling, if hard rock prevents use of Underground Tunneling machines.
A drilling jumbo consists of single or multiple rock drill carriages, Modern drilling jumbos are relatively large, there are however smaller ones for use in cramped conditions.
We have an extensive range of underground drill rigs for mining development, Underground Tunneling and production.
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Why not Contact our industry experts today for more information on the best Underground Tunneling rig to suit you with your ongoing or future Underground Tunneling project.
Selecting a drill rig.
Considerations for a buyer are the mechanical and hydraulic features that will maximize production. Tramming speed is one such feature. That is, how easily can a particular drill rig “tram,” or move itself, from a drilled rock face to the next rock face to be worked. Typically, these machines can’t move quickly—normally less than 10 mph. Yet nimbleness and speed are relative. Every non-drilling minute reduces a shift’s total production, so one or two mph makes a difference.
A buyer should also consider the speed with which a drill rig can position its boom or booms for drilling, because the speed of this set-up process also helps determine a shift’s output. After aligning itself for drilling, a drilling rig’s rock penetration and hole-flushing rates are next thing to consider. From the time you position a drill and start drilling, a hole will be drilled in anywhere from 50 seconds to two and a half minutes depending upon the hardness of the rock.
Another choice is between single-boom drill rigs and two-boom rigs. Because of other factors, production of a two-boom rig vs. a single-boom drill is not 2-to-1. Normally, the two-boom rig will drill 1.5 to 1.7 times what a single-boom rig can drill. It depends on the operator and the hardness of the rock.
Tunnelling and Underground Space
Tunnels and underground excavations – Tunnelling techniques: Tunnels are generally grouped into different categories, depending on the material through which they pass: soft ground, consisting of soil and very weak rock; hard rock; soft rock, such as shale, chalk, and friable sandstone; and subaqueous. Effects of Tunnelling on an Existing Tunnel in Clay Constructing long open cavities in soft ground is a challenging task in its own nature but even more so in an urban environment where it is often constructed next to existing structures, both above and below ground. Advances in tunnelling construction technology such as those of tunnel boring machines have allowed tunnelling works to be carried out efficiently and more importantly, it can be done safely, even in poor soil conditions. While these different types of ground condition require very different methods of excavation and ground support, nearly all tunnelling operations nevertheless involve certain basic procedures: investigation, excavation and materials transport, ground support, and environmental control. Similarly, tunnels for mining and for civil-engineering projects share the basic procedures but differ greatly in the design approach toward permanence, owing to their differing purposes.
For a list of some of the Underground and Tunnelling Drilling Rigs we can offer see below:
Boart Longyear LM90
Mulhauser / LMT KBM12 / KBM9
Soltau RVS 400
Tamrock Maximatic 400SA
Meyco Potenza Maxima
Atlas Copco Boomer 281
Atlas Copco Boomer 282
Normet Himec 9910 B Rex
Atlas Copco XL3C Rocket Boomer
Sigma Plantfinder Ltd. offer a range of drilling machines, drilling rigs and drilling equipment to ensure cost-effective solutions for most ground conditions, to the depth required and correct pile sizes.