Residents living close to the site of a major investigation into abandoned Victorian chalk mines have been able to view the excavation plans.
There was a major ground collapse in January 2000
The £2.6m scheme for Field Road and the Coley district in Reading, Berkshire, is funded by English Partnerships.
Residents were able to look at the equipment that will be used and talk to experts involved in the 2km dig.
On Saturday, Coley Primary School, in Wolseley Street, hosted an open day for residents in the area.
Risk of collapse
More than 30 homes had to be evacuated after a major cave-in in Field Road in 2000 and millions of pounds are now to be spent by Reading Borough Council to make the area safe.
About 700 residents in 285 houses in the Coley area were asked to sign up for drilling tests aimed at ending the risk of collapse.
Maps, records and geological surveys have already been closely examined to find out where the mines are and how far they stretch.
The ground investigations, including dynamic probing, surveying and a small number of boreholes, get under way next month.