Jake Harris and Gary Dulkoski became trapped at the Hopedale operation near Cadiz, Harrison County, about 9.30am by a roof fall.
“Throughout the entrapment, the miners were in full radio contact with rescuers,” US Mine Safety and Health Administration spokeswoman Amy Louviere told ILN.
“Around 7.30pm, they walked out of the mine uninjured.”
Ohio Department of Natural Resources spokeswoman Heidi Hetzel-Evans said the pair had water and oxygen throughout the ordeal.
“Both miners are in good condition,” she said.
The 10 hours following the collapse were used to secure roof supports so rescuers were safe.
Louviere said the affected section of the mine was still under a 103(k) order Thursday, which slows production following an incident. MSHA has started its investigation.
The Hopedale complex is controlled by Rhino Resource Partners. As of December 31, 2011, it had an estimated 27.7 million tons of proven and probable coal reserves, and an estimated 12.3Mt of non-reserve coal deposits.
Coal produced from the Hopedale mine is cleaned at the Nelms preparation plant on the Ohio Central Railroad and the Wheeling and Lake Erie Railroad in Cadiz, then it is shipped by train or truck.
The accident is the state’s second within a month. In September, five miners were injured when two mantrips collided at the Buckingham No. 7 underground mine in Perry County, central Ohio.
Officials said the accident took place as one mantrip entered the mine as another exited
The victims were identified as John Reich, Brian Post, Brian McLaughlin, Todd Sinift and Jeremy Hasman.
According to federal data, the bituminous mine, controlled by Buckingham owner James Graham, produced about 884,000 tons of coal last year and recorded just over 205,000 man-hours.