Rescuers are on standby at least through Sunday morning when more air quality testing can be done. Police said the miners, aged 17 to 62, are believed to be about 1.2 miles down the main tunnel.
Two miners were able to make it out of the mine on their own on Friday. Efforts to contact the trapped miners have been unsuccessful.
Mine officials said the blast was most likely caused by coal gas igniting.
The Associated Press contributed to this story.
