The city of Kiruna was founded in 1900 and quickly became a major centre of iron ore extraction and mining industry.
12.
This form of mining utilizes horizontal or nearly horizontal ( slightly declined ) shafts for ore extraction from sandstone or crag.
13.
There is significant confirmation of Roman industrial occupation within the wood with many iron ore extraction pits and evidence of a bath house.
14.
Iron ore extraction was reduced in the later half of the twentieth century, to be substituted by foreign imported ores of better quality.
15.
Apart from iron ore extractions, cement, diamond, gold, and petroleum resources have also been given due importance to enrich the economy of the country.
16.
The company reflected the vertical integration fashionable at the time embracing activities from coal and ore extraction, and iron and steel making to manufacturing finished goods.
17.
In comparison with January-May 2009 iron ore ( in kind ) increased by 0.8 %, bauxite by 9.5 %, and zinc ore extraction increased 4.5 times.
18.
When compared to surface mining, which requires overburden removal prior to ore extraction, underground mining operations tend to have lower stripping ratios due to increased selectivity.
19.
Bhushan also filed a PIL against illegal iron ore extraction in Goa, which led to the Supreme Court halting all the mining operations in the state.
20.
Remaining evidence leaves no doubt that alongside ore extraction, the large amount of copper was melted here for the casting of tools [ fig . 9 ].
