The mine's owner, Western United Mines (WUM), employs about 50 people at the site near Camborne.
She says he had been complaining about the safety of the mine even before the rockfall.
The inspector said equipment from the mine had now been sent away for analysis.
By July 1st, the Serb forces were claiming to have regained control of the mine.
The expansion would bring the mine to production of approximately 830, 000 ounces of gold annually.
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Plans include extending the mine to the east and upgrading facilities to increase production capacity.
Chilean government officials has criticized the mine for not having the right safety measures in place.
The skyrocketing price tag relates to infrastructure needed to deliver water and electricity to the mine.
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He added that Scotgold would continue efforts to get the mine into full production.
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It said the accident occurred after people dug in dangerous areas of the mine.
Strikes at the mine started two weeks ago when thousands of rock drillers demanded higher wages.
Supt Phil Davies said though there was water in the mine, there was nothing preventing access.
About 100 of the mine's 650 workers are due to be redeployed by UK Coal.
The mine is owned by Poland's largest copper miner, KGHM, and has operated since 1969.
The inquest was told there had been another roof collapse at the mine five days earlier.
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As he went in to hold a meeting with the mine management, they waited outside.
The mine will undergo 13 days of maintenance shutdowns in the fourth quarter for the mill.
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The mine was closed in 2002 amid environmental issues and low rare earth elements prices.
Two other members of their families that worked in the mine were able to escape unharmed.
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Yet Ivanhoe now says it may shut down the mine unless it can obtain new financing.
The mine at Monywa is jointly owned by a Chinese company and the Burmese military.
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The developer said the mine would create 706 jobs when full production was reached in 2024.
The mine boss also denies allegations that the public has access to the tailing pond.
The mine produced 55, 800 ounces of gold and 4, 203, 200 ounces of silver in the third quarter.
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Diamonds from the mine likely to come into commercial production in 2016, Rio Tinto said.
Because the mine sat unused for so long, it has partially filled with water.
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The men were visiting a village in the Malikhel area when the mine went off.
It is unclear if the mine was recent or one left over from a previous conflict.
All three can happen at the same time as they approach the mine from different directions.
Investors then sold shares in the company, fearing that the mine may be pulled.
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