Kellingley Colliery in North Yorkshire closed in December, bringing to an end centuries of deep coal mining in Britain.
Ten former workers were part of a team which filled the mine shaft with concrete.
It took three hours to fill the pit, BBC Look North Business correspondent Danni Hewson said.
A pipe from the centre of the pit was left to release methane gas, used by the on-site power station.
The remaining mine buildings will be demolished, and hundreds of houses could be built on the site within a couple of years, it is understood.
Much of the mine machinery was saved for a new, smaller drift mine nearby - the New Crofton Co-operative Colliery near Wakefield in West Yorkshire which is due to open in June.
A memorial to 17 miners who lost their lives at the colliery is being transferred from the colliery to the National Coal Mining Museum in Wakefield.
Known locally as the Big K, the largest deep pit in Europe was hailed as the new generation of coal mining and could bring up to 900 tonnes an hour to the surface.
Official figures from the Department for Energy and Climate Change show the UK imported more coal than it produced for the first time in 2001 - a trend repeated every year since 2003.
In 2003 the UK produced 28.28m tonnes and imported 31.89m.
The graph below shows how output and imports have changed, with the big dip in 1984 due to the miners' strike.

The video clearly shows the car number plate, but it was a hire vehicle and Nottinghamshire Police said it cannot prove who was driving.
Instead, a man who was eligible to drive the car has been fined Â£150 for failing to provide driver details.
In a statement, the force said it was "disappointed" with the outcome.
The incident happened on 15 November 2014 but the victim has now posted the video online to highlight what he feels is a lack of justice.
"At the time there was an ongoing criminal investigation and I didn't want any footage that I released online to hamper that investigation," he said.
Updates on this story and more from Nottinghamshire
"It's left me feeling surprised at the injustice and the ability for criminals to get away with crimes so easily, especially those perpetrated against cyclists, and it's left the wider cycling community feeling totally betrayed.
"It would never put me off cycling but it has made me very annoyed at the fact that cyclists are being let down time and time again when it comes to justice."
He said he needed four months to recover from his injuries, with a further month of physiotherapy, having suffered a severe back injury and internal haemorrhaging.
The video shows the Volvo being driven behind the cyclist around a roundabout in Nottingham city centre.
The car follows the cyclist from a distance, but then suddenly accelerates and shunts the bicycle.
The camera falls to the ground and the cyclist can be heard groaning and breathing heavily.
Nottinghamshire Police said it had investigated the incident thoroughly.
"While we share the victim's disappointment at the outcome, we feel the investigating police officer made every effort to ensure that the occupants of the car were found and brought before the courts," the force said in a statement.

The female spaniel was found by an off-duty policeman in West Malling, Kent, on Wednesday morning.
The charity said the dog - thought to be a springer or cocker spaniel - had been thrown into an enclosed gateway to a designated dog walking field.
It believed the pup, which has a docked tail, was left the night before.
RSPCA inspector Rosie Russon said: "This poor pup is lucky to be alive.  When she was found, there was frozen solid faeces on the floor next to her.
"How she survived in such freezing conditions, I don't know."
The dog is receiving treatment for a skin condition and sore eye at the charity's centre in Chobham, Surrey.
Ms Russon said that after a 14-day abandonment notice ends and she is fully recovered, the team will find her a new home.
She added: "It's outrageous that somebody thought this was an appropriate way to dump their dog. It was an extremely cruel thing to do."
The charity is keen to hear from anyone who may have information.
The last deep coal mine in the UK has been capped off, three months after its closure.
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Police say there is not enough evidence to prosecute a hit-and-run driver who accelerated into a cyclist - despite the incident being captured on video.
[NEXT_CONCEPT]
A dog is "lucky to be alive" after it was discovered "dumped" over a six foot fence, surrounded by "frozen solid faeces", the RSPCA has said.