coal dust is explosive.solids lumps of coal are not.a) why is coal dust explosive whereas solids coal is notb)what conditions in a coal mine lead to explosions?c)what safety precautions need to be taken in coal mines to avoid explosions?d)what other

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coaldustisexplosive.solidslumpsofcoalarenot.a)whyiscoaldustexplosivewhereassolidscoalisnotb)whatcond

coal dust is explosive.solids lumps of coal are not.a) why is coal dust explosive whereas solids coal is notb)what conditions in a coal mine lead to explosions?c)what safety precautions need to be taken in coal mines to avoid explosions?d)what other
coal dust is explosive.solids lumps of coal are not.
a) why is coal dust explosive whereas solids coal is not
b)what conditions in a coal mine lead to explosions?
c)what safety precautions need to be taken in coal mines to avoid explosions?
d)what other work environments have explosion issues where fine particles mix with air?outline the nature of these issues and the solutions to them.
用中文简单的回答下就行了

coal dust is explosive.solids lumps of coal are not.a) why is coal dust explosive whereas solids coal is notb)what conditions in a coal mine lead to explosions?c)what safety precautions need to be taken in coal mines to avoid explosions?d)what other
回答：
a 因为煤粉散布在空气中,与氧气充分混合,当遇明火时,煤粉短时间内剧烈燃烧,即发生爆炸.而煤块与空气接触的只有表面,即使遇明火也不易燃烧,燃烧也不剧烈,
b煤粉浓度在一定范围内,不太低也不太高,遇明火时,即爆炸
c如定时通风,严禁明火
d大型锅炉房内,有积煤,有火；造煤球场内,有积煤,遇明火时；
解决办法也是保持通风,严禁明火

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