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2000年1-11月份全国煤矿发生一次3人以上伤亡事故408起,其中314起为瓦斯事故,且全是由通风系统不健全、通风能力不足引起。“一通三防”对于煤矿安全的重要由此可见一斑。2002年国家煤矿安全监察局发出紧急通知,要求各级地方政府要重点抓好各类煤
From January to November 2000, there were 408 accidents involving more than three people in the coal mines in the country, of which 314 were gas accidents, all of which were caused by inadequate ventilation systems and insufficient ventilation capacity. “One pass and three defenses ” It is obvious to the importance of coal mine safety. In 2002, the State Coal Mine Safety Supervision Bureau issued an urgent circular calling for local governments at all levels to focus on various types of coal