History of Wigan   (Help with ancient and recent history.)

I have a puzzle in my family tree and I'm hoping someone can help me solve it. I know there was an explosion at the Abram Maypole Pit on 18th August 1908 killing 75 men and I have found a newspaper report which says the first descent of the pit after the disaster was in May 1909.
Does anyone know if there was another pit in Abram still working the Arley mine during that time? My grandfather's young brother Charles Owen Campbell is buried in Hindley Cemetery. His gravestone reads "also Charles Owen Campbell who was killed in the Abram Arley mine on Oct 30th 19?8 aged 15 yrs.
I have a birth record in 1892 and a death record in 1908. If the Maypole was closed between Aug 1908 to May 1909, where was Charles working? I'd be really grateful for any help, I find it really unusual that I can't find any record of his death in colliery records.
Thanks