"It was very well-received. They participated. They listened. They didn't joke and laugh and talk," he said. "It was pretty humbling that day."
Despite his frustration, White said he remains "100 percent supportive" of the stand-down.
"We've got to communicate to these coal miners. There's a lot of regulations and rules there to protect them," he said, "but we've got to keep talking to them."
White said he went underground to see the accident site for himself Wednesday night.
On Friday, officials will do a re-enactment of the accident as part of the investigation.
St. Louis-based Patriot issued a statement expressing sympathy to Fitzpatrick's family and friends. Executive Vice President for Operations Michael May said Patriot is cooperating with the state and federal investigations.
The mine near Comfort employs about 130 workers.