PETTUS, W.Va. — A pair of tall black boots and a lunch pail sat near the altar Sunday at the New Life Assembly church — a memorial to the 29 men killed in the worst U.S. mining disaster since 1970 and a thank-you to those who make their living inside the mountains.

This day, the first Sunday since last Monday’s explosion killed 28 workers and a contractor at Massey Energy Co.’s Upper Big Branch mine in Montcoal, was for many a time to honor the profession.

Pastor Gary Williams, who has worked at Massey Energy mines for 18 years, knew many of the victims. On his way to church Sunday, he heard Ricky Workman’s name among them for the first time.

“I know his child. I know his wife. He’s a part of my family. He’s a part of my life,” he said through tears. “Over time, our hearts and the emptiness that we have inside will fade away, but I don’t never want to forget what happened April 5, 2010.”

Some of those who died have already been laid to rest. Crews worked Sunday to remove the bodies of several others who didn’t make it out, but the recovery had to be halted because of high gas readings in the mine.

Four funerals were held Friday and nearly two dozen will follow in the weeks ahead. Despite hope that four missing miners might have survived long enough for rescuers to reach them, officials announced early Saturday that the four had apparently died instantly.

A complete list of victims has yet to be released. Two other miners were injured in the blast, and one remains hospitalized.

A team of federal investigators will arrive today as officials try to figure out what caused the blast. Virginia-based Massey has been under scrutiny for a string of safety violations at the mine, although CEO Don Blankenship has defended the company’s record and disputed accusations that he puts profits ahead of safety.

During a homily in Wheeling on Sunday, Catholic Bishop Michael J. Bransfield said four years is too short a time between West Virginia mine disasters. The last was at the Sago Mine in 2006, where 12 men perished.

“Can those entrusted with the protection of miners be trusted to fulfill the jobs and enforce the laws?” he said. “Is our technology in the U.S. mines in 2010 equal to the technology that is easily available in other industries? Is it safer to travel in space than to work in a West Virginia mine?”

At churches in the southern West Virginia coalfields, however, the focus was on reflection.

Judy Walker, whose longtime friend Workman died in the accident, stood before the altar at New Life Assembly, mourning the heartache of families she helped cook for this week as they awaited word of their loved ones’ fates.

“All we can do is love on them. When you see them out, hug on them,” she said. “Just let them talk about their fathers, brothers and sons.”