黄陇煤田店头矿区看到了煤堆自燃的“壮景”。店头至腰坪约20km的土路沿线,有十余座小煤矿。虽然运煤的汽车往来不断,每个小矿的广场上,仍有堆积如山的煤堆,煤堆上冒出缕缕清烟,即使浇水,似乎也无济于事。后来才知道,这是煤在自燃。表皮的煤完整无损,内部已经烧成了灰烬。那么,为什么有的地方的煤会自燃,而有的地方的煤又不会自燃?煤又是如何自燃的?它是由什么原因引起的? 煤自燃的地质背景对我国众多的煤田地质资料进行综合分析,不难发现,凡发生煤层自燃或煤堆自燃的煤田,基本上都是中、新生代,特别是中生代形成的煤田。例如陕北神府煤田、黄陇煤田都是中生代煤田,宁夏回族自治区、内蒙古自治区及新疆维吾尔族自治区的自燃煤田,也是侏罗纪煤田。其特征是煤变质程度较低、煤 Huangtong coalfield saw the first coal mine spontaneous combustion “Zhuang King ”. Shop head to waist about 20km along the dirt road, there are more than ten small coal mines. Although the transportation of coal cars constantly, each small square in the mine, there are still piling up pile of coal, pile of smoke emerge on the pile of smoke, even if the watering seems to be of no avail. Later learned that this is spontaneous combustion of coal. The skin of the coal intact, the interior has been burned to ashes. So, why some areas of the spontaneous combustion of coal, and in some places will not spontaneous combustion of coal? And how spontaneous combustion of coal? It is caused by what causes? Geological background of spontaneous combustion of coal in China’s many coal geological data Comprehensive analysis, it is not difficult to find that where coal spontaneous combustion or coal spontaneous combustion coal fields are basically in the Mesozoic, Cenozoic, especially the coal formed Mesozoic. For example, Shenfu Coalfield and Huanglong Coalfield in Shaanxi Province are both spontaneous coalfields of Mesozoic coalfields, Ningxia Hui Autonomous Region, Inner Mongolia Autonomous Region and Xinjiang Uygur Autonomous Region and also Jurassic coalfields. Its characteristics are lower coal metamorphism, coal