Question

What is spontaneous combustion? what is the common causes of fire in coal mine?

Answer 1

Explanation:

there are gases trapped inside the coal mines, like methane which are highly inflammable. whenever digging or drilling tools are used there is spark generated. these gases gets ignited. which causes fire accidents. so nowadays in most of the coal mines operation tungsten tools are used which are sparkless tools.

Answer 2

Answer:

1)In spontaneous combustion ,a combustion occurs suddenly at a temperature.

Explanation:

2)The cause of fire of coal mine are :

a) In this activity a friction occurs between a coal and a combustible substance.

b) Or the coal riches at a high temperature because coal is deep under the earth which is so hot and burns at that place.