Total run-of-mine production from the company was 1.11 million tonnes in the recent quarter compared to 1.75Mt the previous June quarter.
But the company said its other operations increased production by almost 20% quarter on quarter in its recent result.
The metallurgical coal producer also blamed a temporary shortage in railway wagons for reducing sales, which fell 31% to 0.68Mt in the September quarter compared to the previous three months.
The company plans to restart longwall mining at its Raspadskaya mine before the end of 2010.
Raspadskaya was Russia’s largest single underground mine and had four longwall faces.
The recovery effort involves pumping the remaining water out of the mine, with more bodies expected to be uncovered.
The total reconstruction of the mine is forecast to cost $US280 million, which includes compensatory social payments and preparation of the coal faces.
“We continue pumping out the water from the seam #7 and searchâ€andâ€rescue operations at Raspadskaya mine,” Raspadskaya chief executive officer Gennady Kozovoy said in the September quarterly results.
“The project for fire extinguishing at the seam #6 had been agreed and we started its implementation.”
