21. It would have ignited the firedamp , exacerbated and fuelled by coal dust in the air. 22. The explosion was caused by firedamp ignited by a'flash'from a damaged cable. 23. At a certain concentration the gas ( firedamp or methane ) burned but did not explode. 24. The explosions were caused by firedamp . 25. He invented a gas regulator and a firedamp detector which were not retained by the manufacturers. 26. This experimental form of illumination avoided the necessity of using candles which risked sparking explosions of firedamp . 27. In March 1992 at the TCC Kozla mine, 263 miners were killed due to a firedamp explosion 28. Early reports blamed a sudden inrush of firedamp from old workings which pitmen had inadvertently broken into. 29. On February 6, 1930, an explosion caused by firedamp gas occurred in the Standard mine. 30. The verdict of the coroner's jury was accidental death caused by an explosion of firedamp .
