tunnel

A miner with a donkey makes his way through the low and narrow tunnel leading out of a coal mine in Choa Saidan Shah in Punjab province, April 29, 2014. Workers at this mine in Choa Saidan Shah dig coal with pick axes, break it up and load it onto donkeys to be transported to the surface. Employed by private contractors, a team of four workers can dig about a ton of coal a day, for which they earn around $10 to be split between them. The coalmine is in the heart of Punjab, Pakistan's most populous and richest province, but the labourers mostly come from the poorer neighbouring region of Khyber Pakhtunkhwa. Picture taken April 29, 2014.

Sara Farid/Reuters

A miner with a donkey makes his way through the low and narrow tunnel leading out of a coal mine in Choa Saidan Shah in Punjab province. Workers at the Choa Saidan Shah mine dig coal with pick axes, break it up and load it onto donkeys, to be transported to the surface

Crossrail construction workers on the Connaught tunnel below the Royal Docks in east London. Derelict since 2006 when rail services stopped using the route, works are taking place to deepen, strengthen and widen the structure to ensure that is ready for the arrival of crossrail trains, from 2018 up to 12 trains an hour in each direction will run through the tunnel first built in 1878 linking Woolwich to Custom House, Canary Wharf and Central London.

Chris Radburn/PA

Crossrail construction workers on the Connaught tunnel below the Royal Docks in east London. Derelict since 2006 when rail services stopped using the route, works are taking place to deepen, strengthen and widen the structure to ensure that is ready for the arrival of crossrail trains, from 2018 up to 12 trains an hour in each direction will run through the tunnel first built in 1878 linking Woolwich to Custom House, Canary Wharf and Central London.

A worker is seen inside the Cuncas II tunnel near Mauriti

Ueslei Marcelino/Reuters

A worker is seen inside the Cuncas II tunnel that will link the canals being built to divert water from the São Francisco river for use in four drought-plagued states in Brazil, a project that is three years behind schedule and has doubled in cost from the original estimate of $3.4bn, near the city of Mauriti, Ceará state

Crossrail construction...One of the Crossrail tunnels under construction 35 metres below the streets of Whitechapel, east London, which has proved to be one of the most challenging and impressive sites in the whole Crossrail project, and will be part of the 38 station route from Maidenhead Royal Berkshire in the west to Shenfield in Essex in the east. PRESS ASSOCIATION photo. picture date: Wednesday December 18, 2013. Photo credit should read; John Stillwell/PA Wire

John Stillwell/PA

A Crossrail tunnel under construction 35 metres below the streets of Whitechapel, east London, one of the most challenging sites in the Crossrail project. The completed service will run from Maidenhead and Heathrow in the west to Shenfield and Abbey Wood in the east. Construction is expected to be completed in 2017, with services running in 2018. Read more

Crossrail construction...Crossrail worker Sam Agyeman, inspects the first completed section of Crossrail tunnel, after tunnelling machine Phyllis completed the 6.8 kilometre, 18-month journey between Royal Oak and Farringdon. PRESS ASSOCIATION Photo. Picture date: Tuesday November 19, 2013. See PA story TRANSPORT Crossrail. Photo credit should read:

Sean Dempsey/PA

A worker inspects the first completed section of London’s new Crossrail tunnel, which will provide new train links across the UK capital to Heathrow airport. Tunnelling machine Phyllis completed the 6.8km section between Royal Oak in the west and central Farringdon after 18 months of work. Crossrail, Europe’s largest construction project, is expected to be finished in 2019. Read more

A tunnel worker ascends on a rope inside a smuggling tunnel dug beneath the Gaza-Egypt border in the southern Gaza Strip. Hamas is struggling to meet its payroll in the Gaza Strip, where income from taxes has been badly hit since neighbouring Egypt started destroying a network of tunnels used to smuggle food, fuel and weapons into the Islamist-run enclave. Picture taken October 8, 2013.

Ahmed Zakot /Reuters

A tunnel worker ascends on a rope inside a smuggling tunnel dug beneath the Gaza-Egypt border in the southern Gaza Strip. Hamas is struggling to meet its payroll in the Gaza Strip, where income from taxes has been badly hit since neighbouring Egypt started destroying a network of tunnels used to smuggle food, fuel and weapons into the Islamist-run enclave.