• Tunnel boring machine - Wikipedia

    A tunnel boring machine (TBM), also known as a "mole", is a machine used to excavate tunnels with a circular cross section through a variety of soil and rock strata.They may also be used for microtunneling.

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  • Niagara Tunnel Project - Chronology

    A Chronology of the Niagara Tunnel Project in Niagara Falls, Ontario

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  • Main Beam | The Robbins Company

    Tunnel Boring Machines In hard rock nothing bores tunnel faster than a Main Beam TBM. If you want to bore a tunnel through hard rock in the shortest time possible, then the Robbins Main Beam TBM is the right solution.

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  • Purchasing - Commodity Codes Search

    The Commodity Codes Search page lists all NIGP commodity codes and is searchable.

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  • Double Shield | The Robbins Company

    Tunnel Boring Machines For projects with difficult ground that still demand the speed of a Main Beam TBM Fractured rock can be an insurmountable obstacle if you buy the wrong machine.

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  • EM 1110-2-2901 Tunnels and Shafts in Rock | Rock (Geology ...

    EM 1110-2-2901 Tunnels and Shafts in Rock - Ebook download as PDF File (.pdf), Text File (.txt) or read book online.

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  • Tunnel Update - February 2018 - Tunnel Business Magazine

    Three times per year, TBM: Tunnel Business Magazine recaps the status of major tunneling projects underway in the United States and Canada. Below is the Tunnel Update that appeared in the February 2018 issue of the print edition.

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  • Tunnel boring machines manufacturer for major tunnel projects

    Hard rock machines. Our product offer is built around three types of tunneling machines for all types of geology, whatever the hardness of the rocks and the diameter to dig: single shield machines, telescopic shield machines and gripper machines.

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  • Hard-Rock Tunnel Boring Machines

    The "invention" of a machine capable of excavating large-diameter tunnels in hard rock was one of the greatest achievements in the history of tunneling.

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  • A review of rock cutting for underground mining: past ...

    SYNOPSIS. Rock has been cut in the process of mining since before the invention of explosives. Today, we seek to return to cutting to reap the benefits of continuous operations for South African underground hard-rock mines, to improve speed of access to the orebody, and to improve the efficiency of mining operations.

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