Report filed to abate 9087305. Bits of 12CM11 miner hit an old EBA 6.5 (1981) while cleaning between third and fourth crosscut at 235 block at rehab area. Resulted in sudden release of pressure when cylinder ruptured. There was no charring or residue on the miner or in the entry to indicate ignition occurred. After investigating, MSHA & the operator agreed it was not an ignition.