Mining of Minerals
Mining of Minerals
Mining of Minerals: The economic activity of extraction of minerals from below the Earth’s surface is called mining. Most of fossil fuels are extracted by this method. Various factors affect the economic viability of the reserve i.e. concentration of mineral in the ore, the ease of extraction and closeness to the market, etc before mining of the mineral starts. To extract minerals from a shallow depth by removing the overlying materials is called open cast mining.
Rat-Hole Mining: Most of the minerals in India are nationalised and their extraction is possible only after obtaining due permission from the government. But in most of the tribal areas of the North-East India, minerals are owned by individuals or communities. In Meghalaya, there are large deposits of coal, iron ore, limestone and dolomite, etc. Coal mining in Jowai and Cherapunjee is done by family member in the form of a long narrow tunnel, known as rat-hole mining.
A period of the Earth's geological history in which 98% of Indian coal was formed is _______________________ | |||
| Right Option : A | |||
| View Explanation | |||
Name the richest, deepest and oldest gold mine in India. | |||
| Right Option : C | |||
| View Explanation | |||
Rat hole mining is done in which of the following areas? | |||
| Right Option : A | |||
| View Explanation | |||
Students / Parents Reviews [10]
Abhyas Methodology is very good. It is based on according to student and each child manages accordingly to its properly. Methodology has improved the abilities of students to shine them in future.
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10thAbhyas is a complete education Institute. Here extreme care is taken by teacher with the help of regular exam. Extra classes also conducted by the institute, if the student is weak.
Om Umang
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Archit Segal
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Yatharthi Sharma
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Hiya Gupta
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Prisha Gupta
8thOne of the best institutes to develope a child interest in studies.Provides SST and English knowledge also unlike other institutes. Teachers are co operative and friendly online tests andPPT develope practical knowledge also.
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7thIt was good as the experience because as we had come here we had been improved in a such envirnment created here.Extra is taught which is beneficial for future.
