However, coalmine accidents do occur frequently recent years, it has always been a thorny problem to our country's administration of coalmine safety work.
然而，近几年来，煤矿事故却频繁发生，这成为我国煤矿生产安全管理工作面临的一个重大难题。
Accidents of safety in production always happen in coalmine, it is more serious of coalmine firedamp in recent years.
我国煤炭安全生产事故频发，近年煤矿瓦斯事故较为严重。
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