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目前,有自燃发火倾向煤层的防火灭火问题,假顶或再生顶板下的机械化采煤问题,是直接关系到煤矿的安全与生产的重要问题。这些问题若不能很好地解决,就不能
At present, the spontaneous combustion prone to fire prevention and control of coal seams, false roof or mechanized mining under the roof of the issue is directly related to coal mine safety and production of important issues. If these problems can not be solved well, they can not