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沼气着火是长壁工作面操作人员面临的最严重的危险之一.虽然在美国长壁工作面盘区至今还没有因沼气着火导致事故的记载,但总的看来,着火次数每年都在增加.采煤机切割过程中泄放出大量的沼气是采矿人员最为关注的.随着美国长壁工作面数的不断增加,工作面着火次数也将增加,为此必须采取新的控制沼气的方法.此外,随着开采深度的增加,泄放出的沼气浓度可能增大.
Biogas firing is one of the most serious dangers facing operators of longwall faces Although there are no documented incidents of methane gas fires in the longwall coalface of the United States so far, the overall number of fires is increasing every year The discharge of large amounts of biogas during shearer cutting is of utmost concern to miners, and as the number of longwall faces in the United States continues to increase, the number of flames on the face will also increase, necessitating new approaches to controlling biogas. In addition, as the mining depth increases, the concentration of released biogas may increase.