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目前，全国不少地方煤矿在研究与预防透水、顶板、瓦斯和机电运输四大灾害方面，摸索出一些成功的经验，但有些地方煤矿，特别是乡镇煤矿，由于没有端正安全与生产、安全与经济承包及安全与经济效益的关系，加之技术素质与管理水平所限，工人流动性大等原因，使一些恶性事故不
At present, some local coal mines have found some successful experiences in studying and preventing the four major disasters of water, ceiling, gas and electromechanical transportation. However, some local coal mines, especially township and town coal mines, have failed to rectify their safety and production Economic contracting and the relationship between safety and economic efficiency, coupled with the limitations of technical quality and management level and the large mobility of workers, make some serious accidents not