Miners and residents near the El Comal gold and silver mine in Bonanza, about 260 miles northeast of Managua, have studied possible ways to reach the trapped miners, said commander Javier Amaya of the rescue team.
"We have organized a rescue plan. Every 15 minutes a group of five or 10 miners will enter the mine on wooden ladders, tying themselves off and going in until they reach them," said Amaya.
The slide occurred Thursday at the gold and silver mine, which is operated by Hemco. The trapped miners are not employees of Hemco, but rather freelancers allowed to work in the company's concession if they sell any gold they find to the firm, mining company spokesman Gregorio Downs told The Associated Press.
Downs said the company had warned miners about the danger of working in the El Comal area, especially after two miners died in a rain-caused landslide there last month.
"We live by extracting mineral from Hemco. They told us digging here was risky, but sometimes one is willing to risk it for a few more cents," said Absalon Toledo, director of the informal miners.
Authorities didn't receive word until late Thursday after the mine lost contact with the workers, who are believed to be about 165 feet below the surface. There were originally 26 miners underground but two were rescued.
Relatives of the trapped miners gathered Friday on the margins of the rescue operation. Friends held up Margarita Mendez, who looked like she was going to faint as she awaited news about her son, Salvador Urbina.
Downs told the government's news website that the company initially had contact with the trapped miners. But he said apparently there were more slides inside after the initial one.
According to the website of Nicaragua-based Hemco, the company has mined in the north Atlantic municipality since 1995 and employs 532 workers, who process 700 tons of material a day. The company, majority owned by Colombia's Mineros S.A., says it produces more than 2,500 pounds of gold a year and is Nicaragua's 12th largest exporter.