Bersham Colliery, Wrexham, 1880
Shotfiring ignited a blower which eventually caused an explosion. 9 died.

Bersham Colliery, Wrexham, 1909
Methane explosions caused by shotfiring. 9 died.

Brynmally Colliery, Wrexham, 1856
Inrush of water from old workings. 13 died.

Brynmally Colliery, Wrexham, 1889
Explosion caused by a sudden release of gas due to a roof fall igniting on opened lamps. 20 died.

Bryn-yr-owen Colliery, Wrexham, 1855
Accident. 7 died.

Frood Colliery, Wrexham, 1854
Accident. 7 died.

Gresford Colliery, Wrexham, 1934
Methane explosion. 260 died.

Llay Main Colliery, Wrexham, 1924
Methane explosion caused by shotfiring. 9 died.

Minera Colliery, Wrexham, 1844
Explosion. 5 died & 2 injured.

Minera Colliery, Wrexham, 1849
Explosion. 9 died.

Mostyn Colliery, Mostyn, 1806
2 Explosions  reported in 1806. 66 died.

Pendwll Colliery, Wrexham, 1878
Explosion. 6 died.

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