describe the various types of tunnelling

describe the various types of tunnelling

Field electron emission - Wikipedia

Field electron emission (also known as field emission (FE) and electron field emission) is emission of electrons induced by an electrostatic field. The most common context is field emission from a solid surface into vacuum.

OPC Ole for Process Control Protocol

OPC (O LE for P rocess C ontrol) is a series of standards specifications. The first standard (originally called simply the OPC Specification and now called the Data Access Specification) resulted from the collaboration of a number of leading worldwide automation suppliers working in cooperation with Microsoft.

Long-term tunnel behaviour and ground movements after ...

Long term ground movements above a tunnel may continue to increase with time after tunnelling in clayey soils as the tunnelling-induced excess pore water pressures dissipate, whilst the changing earth pressure acting on the tunnel leads to further tunnel deformation during consolidation.

History of Technology - Electropaedia, Energy Sources and ...

Heroes and Villains - A little light reading. Here you will find a brief history of technology. Initially inspired by the development of batteries, it covers technology in general and includes some interesting little known, or long forgotten, facts as well as a few myths about the development of technology, the science behind it, the context in which it occurred and the deeds of the many ...

CONSUB - Official Site

CONSUB holds specialist expertise in the field of valves and offer our services in a unique and flexible way.. We recognize that there are many situations on projects or within an operations environment where there is a need for valve expertise but not necessarily on a full-time basis.

Microscope - Wikipedia

A microscope (from the Ancient Greek: μικρός, mikrós, "small" and σκοπεῖν, skopeîn, "to look" or "see") is an instrument used to see objects that are too small to be seen by the naked eye.

What is Piping - Official Site

What is Piping. An attempt to explain piping engineering basics in detail to help all the piping engineering professionals around the world.

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

WITS SPECIAL EDITION - VOLUME I . A review of rock cutting for underground mining: past, present, and future . D. Vogt. Centre for Mechanised Mining Systems, University of the Witwatersrand Johannesburg, South Africa

RETC 2019 | Rapid Excavation & Tunneling Conference

RETC is proud to present more than 21 technical sessions featuring the leading practitioners in the tunneling industry from across the U.S. The primary focus of the technical program is to add value to the industry through examination of the most innovative practices and products currently in use.

Bob Briscoe's publications

Home Profile Biography Projects Collaborators Publications Presentations : Bob Briscoe's publications Contents Communications Architecture. Congestion Policing

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About KAMY

KAMY series of Roadheaders offers the best cutting performance in a wide range of rock formations. Equipped with geometrically optimized transverse or longitudinal cutter heads, these flexible machines can be used to excavate subway tunnels, road tunnels, railway tunnels and water tunnels without using explosives.