Coal industry sources account for virtually all of the $29,796 Virginia Del. Erwin S. (Shad) Solomon of Bath County has raised in his bid for the Democratic nomination for state attorney general.

In papers received today by state elections officials, Solomon disclosed that the Wellmore Coal Corp. of Grundy, also a major contributor to gubernatorial candidate Andres P. Miller, had given him $15,000 and Hiram A. Street, a Gryndy lawyer who represents coal interests, had contributed $10,000. Solomon, one of four candidates in the attorney general's primary June 14, said he has lent his campaign $4,885.34.

By May 10, the last day of the reporting period convered in his report, Solomon said he had spent $23,250, an amount smaller than the expenditures reported Monday of any of his opponents, Dels. Edward E. Lane of Richmond, John L. Melnick of Arlington and John T. Schell of McLean.

Separately, 11 regional committees supporting former Lt. Gov. Henry E. Howell's race for the gubernatorial nomination, reported they have collected a total of $29,867.87, borrowed anotehr $4,494, and have spent $27,874.91. That is in addition to $240,869.36 that Howell's statewide campaign reported Friday it had received in contributions through May 10.

Even so, the total Howell amount still is well below the record $699,008 that Miller's state campaign said it had raised in the same period. Unlike Howell, all of Miller's funds are being reported by his statewide committee, a Miller spokesman said.