一、预防内因火灾的有效方法1.正确地选择开拓和采矿方法开采煤层,采用石门、脉外巷道或公用脉外巷道方式进行开拓,由于少留煤柱,少切割煤层,自燃发火的危险较少。在开采程序上应遵守先采上层后采下层的原则,否则,上层煤容易受到破坏而发生自燃。当开采自燃性较强的煤层时,回采方向应采用由井田边界向井角方向推进的后退式回采,在防止煤的自燃方面,它比前进式回采有效。 I. Effective ways to prevent internal fires 1. Choose the right way to open up and mine the coal seam and adopt the way of stone gate, extraneous roadway or communal extraneous roadway to open up. Because of less coal pillar and less cutting seam, less. In the mining process should follow the principle of first mining the lower after mining, otherwise, the upper coal easily damaged and spontaneous combustion occurs. When mining spontaneous combustion coal seam, recovery direction should be adopted from the minefield to the direction of the wellhead backward thrust recovery, in preventing spontaneous combustion of coal, it is more effective than forward mining.