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鉴别煤层的突出危险性是研究煤与瓦斯突出的主要任务之一。它对于选择防止突出措施,保证人身安全以及保证生产计划的顺利完成都有重要的意义。北票煤田生成于侏罗系,为倾向西北的单斜构造,煤层倾角20～75°。共含煤17层,其中14层可采或局部可采。煤层厚度0.4～4米。煤质为低磷、低硫的气煤、气肥煤和焦肥煤,可供炼焦和工业动力用。煤田地质构造较复杂,断层、摺曲较发育;煤层厚度和倾角,局部地区有变化;部分地区有火成岩侵入,致使煤层接触变
Identifying the outstanding danger of coal seams is one of the major tasks for studying coal and gas outburst. It is of great significance to the selection of prevention measures, personal safety and the successful completion of the production plan. The Beipiao coalfield was formed in the Jurassic, with a monoclinic structure inclined to the northwest. The coal seam dip angle is 20 ~ 75 °. A total of 17 layers of coal, of which 14 can be recoverable or locally recoverable. Seam thickness of 0.4 to 4 meters. Coal is low phosphorus, low sulfur gas coal, gas fat coal and coke, for coking and industrial power. Coalfield geological structure is more complex, fault, bend more developed; seam thickness and dip, there are changes in some areas; some areas have igneous intrusion, resulting in contact with the coal seam variable