Lengede-Broistedt mine flood in Germany

A reservoir dam collapse at an iron mine in Breustadt, Germany, trapped 43 miners, with three finding refuge in an air pocket. A massive rescue effort was launched, drawing parallels to a similar incident in Hazleton, Pennsylvania. Communication was established with the trapped miners, who were under heavy air pressure. The rescue involved drilling a shaft with extraordinary precautions to prevent a sudden air escape. After more than a week of effort, the rescue reached its climax, saving the trapped miners.

What was the immediate consequence of the dam collapse at the iron mine?

• The mine was completely destroyed.

• The mine was evacuated before the collapse.

• All miners were immediately rescued.

• Tons of water flooded the mine shafts.

How many miners initially found safety after the dam collapse?

• 3 miners

• 129 miners

• 86 miners

• 43 miners

What was the purpose of the narrow communication pipe drilled during the rescue operation?

• To allow miners to escape

• To lower food to the trapped miners

• To drain water from the mine

• To provide light to the trapped miners

What precaution was necessary due to the high air pressure in the gallery?

• Using explosives to break through

• Reducing the number of rescuers

• Installing air locks after lining the shaft

• Increasing the speed of drilling

How long did the rescue operation take to reach the trapped miners?

• Several months

• More than a week

• Two days

• A few hours