Question

extraction of coal..............​

Answer 1

Answer:

Coal can be extracted from the earth either by surface mining or underground mining. Once coal has been extracted, it can be used directly (for heating and industrial processes) or to fuel power plants for electricity. If coal is less than 61 meters (200 feet) underground, it can be extracted through surface mining.

Answer 2

Answer:

coal is extracted from coal seam either through surface mining or underground mining. surface mining is used when coal is found close to the surface or hillsides. underground mining is used to extract scold that is deep beneath the surface of the earth.

coal is processed in the industrial to get useful product such as coke ,coal, tar and cool gas. in this process coal is heated strongly in absence of air this process is called destructive disiner lity of coal.

Step-by-step explanation:

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