ME home
 
  SME FaceBook SME Twitter SME LinkedIn RSS Feed

Subscriber or
SME Member Log On

WEB-ONLY CONTENT

Go to SME eNEWS

MINING INDUSTRY EVENTS

11th International Mine Ventilation Congress  - Conference
Sep 14, 2018 - Sep 20, 2018
XXIX International Mineral Processing Congress  - Conference
Sep 15, 2018 - Sep 21, 2018
SEG 2018: Metals, Minerals and Society  - Conference
Sep 22, 2018 - Sep 25, 2018
14th Symposium of Continuous Surface Mining  - Conference
Sep 23, 2018 - Sep 26, 2018

METAL PRICES


Au
Ag
Pt
Pd
Ni
Cu
Al
Pb

AGGREGATES
AND MINERALS
MARKETPLACE


http://aggregatesmineralsmarketplace.com
The Mining Engineering, SME and NSSGA
Online Buyers Directory Site
The Online Global Mining and Minerals Library Site
September 2018
Volume 70    Issue 9

The risks associated with TBM procurement and the next steps toward industry change

Mining Engineering, 2018, Vol. 70, No. 9, pp. 116-116
Home, Lok; Brierley, Gary


PREVIEW:

The majority of tunnels for civil engineering applications are now being constructed using some form of mechanical excavation. Beginning in the 1960s with rock tunnel boring machines (TBM), the tunneling industry has introduced both earth pressure balance (EPB) and slurry pressure balance (SPB) soil machines; mixed soil and rock machines and a variety of different mechanical devices for the construction of small diameter tunnels. Over time, these machines have become more powerful and more adaptable to a wider variety of ground conditions; so much so that tunnels are now being constructed in ground conditions and in the vicinity of third-party impacts that would have been considered beyond the state of the art just 10 years ago. Figure 1 is an example of a mixed ground crossover TBM used successfully at Mexico City’s Túnel Emisor Poniente II.  



Please login to access this article.

OR

If you are not an SME member, you can join SME by clicking the button below.