What type of headlamps were used in coal mining during the 18th century?

During the 18th century, miners typically used simple oil lamps or candles attached to their hats or helmets as headlamps while working in coal mines. These lamps provided a small source of light to help the miners see in the dimly lit underground tunnels.

What coal mine in Oklahoma exploded with a 50ft+ stream of fire in the coal mining era of the 18th century? The explosion killed some workers I believe.

The coal mine explosion you are referring to occurred at the Iron Mountain Coal Company Mine in McAlester, Oklahoma in 1913, not during the 18th century. This tragic event resulted in a massive explosion with a 50-foot stream of fire and led to the deaths of 73 coal miners. It remains one of the deadliest coal mining disasters in Oklahoma's history.