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  2. Tunnel boring machine - Wikipedia

    en.wikipedia.org/wiki/Tunnel_boring_machine

    A tunnel boring machine (TBM), also known as a "mole" or a "worm", is a machine used to excavate tunnels. Tunnels are excavated through hard rock, wet or dry soil, or sand, each of which requires specialized technology. Tunnel boring machines are an alternative to drilling and blasting (D&B) methods and "hand mining".

  3. Subterrene - Wikipedia

    en.wikipedia.org/wiki/Subterrene

    The plausibility of such machines has declined with the advent of the real-world tunnel boring machines, which demonstrate the reality of the boring task. Tunnel boring machine themselves are not usually considered to be subterrenes, possibly because they lack the secondary attributes – mobility and independence – that are normally applied ...

  4. Category:Tunnel boring machines - Wikipedia

    en.wikipedia.org/wiki/Category:Tunnel_boring...

    Beck tunnel boring machine; Bertha (tunnel boring machine) M. Martina (tunnel boring machine) T. Tuen Mun–Chek Lap Kok TBM

  5. Tunnel construction - Wikipedia

    en.wikipedia.org/wiki/Tunnel_construction

    Tunnel Construction. Tunnels are dug in types of materials varying from soft clay to hard rock. The method of tunnel construction depends on such factors as the ground conditions, the ground water conditions, the length and diameter of the tunnel drive, the depth of the tunnel, the logistics of supporting the tunnel excavation, the final use and shape of the tunnel and appropriate risk management.

  6. Shaft sinking - Wikipedia

    en.wikipedia.org/wiki/Shaft_sinking

    With the advancements made in raise boring technology, raise borers have been used to create a pilot hole for shaft sinking, where access exists at the bottom of the new shaft, in this case the sinking phase is dedicated to enlarging this pilot hole to full diameter (a process usually called "slashing").

  7. Workers at Elon Musk’s Boring Co. accidentally dug ... - AOL

    www.aol.com/finance/workers-elon-musk-boring-co...

    More coverage from Fortune on safety at the Boring Co.: - ‘We have consistently flirted with death’: Elon Musk wanted the Boring Co. to build a tunnel system below Las Vegas. Former employees ...

  8. Directional boring - Wikipedia

    en.wikipedia.org/wiki/Directional_boring

    Directional boring, also referred to as horizontal directional drilling (HDD), is a minimal impact trenchless method of installing underground utilities such as pipe, conduit, or cables in a relatively shallow arc or radius along a prescribed underground path using a surface-launched drilling rig. Directional boring offers significant ...

  9. Immersed tube - Wikipedia

    en.wikipedia.org/wiki/Immersed_tube

    An immersed tube (or immersed tunnel) is a kind of undersea tunnel composed of segments, constructed elsewhere and floated to the tunnel site to be sunk into place and then linked together. They are commonly used for road and rail crossings of rivers, estuaries and sea channels/harbours.