Aberfan Tip, Merthyr Tydfil, 1966
No 7 tip of Merthyr Vale Colliery slipped down the steep hillside and engulfed houses and a school in Aberfan village. 28 adults and 116 children died and a further 6 adults and 29 children were injured.

Albion Colliery. Pontypridd, 1906
Methane explosion caused by sparks from a battery. 8 died,

Birchrock Colliery, Pontardulais, 1909
Methane explosion cause by the use of a naked light. 5 died.

Blaenclydach Colliery, Blaenclydach, 1941
In the morning when the shift was being lowered down the pit down a road which dipped nine inches to the yard by an electric haulage engine, the tubs got out of control and gathered speed down the dip. 5 died & 70 injured.

Cambrian Colliery, Clydach, 1905
Methane Explosion. 33 died & 11 badly burnt.

Cambrian Colliery, Rhondda, 1965
Methane Explosion. 30 died.

Court Herbert Colliery, Neath, 1906
Methane explosion caused by a gob fire. 5 died.

Darran Colliery, Deri, 1909
Explosion of coal dust caused by shot firing. 22 died.

Deep Navigation Colliery, Treharris, 1902
Shaft Accident. 5 died.

Dinas Main Colliery, Gilfach Coch, 1907
Coal dust explosion caused by shotfiring. 7 died.

Dowlais Colliery. Cardiff, 1906
Coal tubs ran away after a link broke. 5 died.

Elba Colliery, Gowerton, 1905
Methane explosion. 11 died.

Fire Engine Colliery, Neath, 1795
Explosion, 20 died.

Fochriw Colliery, Gellingaer, 1902
Methane explosion cause by the use of a naked light. 8 died.

Glenavon Colliery, Rhondda, 1900
Water inrush from old flooded workings. 5 died.

Lewis Merthyr Colliery Trehafod, 1956
Methane Explosion caused by a roof fall which brought the gas down. Ignition was caused by sparks created as stones struck the steel arches. 9 died & 5 injured.

Llanbradach Colliery. Cardiff, 1901
Methane explosion. 11 died.

Llansamlet Colliery, Swansea, 1788
Methane Explosion  cause by naked lights. 13 died from the effects of afterdamp.

Llwynypia Colliery, Porth, 1932
Methane Explosion. 10 died & 2 injured.

National Colliery, Wattstown, 1905
Methane Explosion. 112 died.

Naval Colliery Ely Pit, Penycraig, 1909
Shaft Accident. 7 died.

New Duffryn Colliery, Aberdare, 1850
Methane Explosion caused by a sudden outburst of gas ignited by a naked light. 8 died & 8 injured.

Ponthenry Colliery, Lllanelly, 1924
Five men died due to suffocation by gas.

Seven Sisters Colliery, Merthyr, 1907
Methane explosion. 5 died

Tarnei Colliery, Pontardawe, 1909
Inrush of water from old flooded workings. 5 died & 4 injured.

Tower Colliery, Hirwaun, 1962
Methane explosion caused by arching resulting from a short circuit to earth in a newly inserted length of cable serving the electrical equipment in the heading. 9 died & 9 injured.

Universal Colliery, Senghenydd, 1901
Methane Explosion. 80 died.

Universal Colliery, Senghenydd, 1913
Methane Explosion. 439 men & boys died.

Waunddu Colliery, Swansea, 1788
Methane Explosion caused by naked lights. 6 died

Wernfraith Colliery, Neath, 1758
Explosion, 10 died.

Wernfraith Colliery, Neath, 1770
Methane Explosion caused by naked lights. 17 died.

Wernbwll Colliery, Penclawdd, 1929
Methane explosion cause by the use of naked lights. 7 died.

Winch Pond Colliery, Neath, 1764
Explosion, 18 died.

Winch Pond Colliery, Neath, 1779
Explosion, 11 died.

Windsor Colliery, Abertridwr, 1902
Staging the the shaft collapsed during sinking. 6 died.

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