宁夏煤炭资源丰富,煤类多,在区域和垂向上呈现出明显的规律性。晚古生代煤层以中、高变质的烟煤、无烟煤为主,中生代煤层以低变质的烟煤为主,从各含煤区分布看,贺兰山、香山含煤区多为高变质的烟煤和无烟煤,灵盐、固原含煤区以低变质烟煤为主,青铜峡—固原深断裂西部的煤变质程度明显高于东部。分析认为深成变质作用对各时代煤变质具有普遍意义,在此基础上,岩浆热力变质作用和动力变质作用也是导致局部地区煤变质增高的因素,如贺兰山含煤区的汝箕沟矿区,受隐伏岩浆热力影响,以岭大井田为中心,呈现北东向展布的半环带状煤级分带;香山含煤区各时代煤类分布方向与区域构造线方向一致,推测可能在深成变质作用下叠加了岩浆热力变质和动力变质作用。 Ningxia is rich in coal resources and has a large number of coal and shows obvious regularity both regionally and vertically. The Late Paleozoic coal seams were medium-high metamorphic bituminous coal and anthracite, while the Mesozoic coal seams were mainly low-metamorphic bituminous coal. According to the distribution of coal-bearing areas, Helan Mountain and Xiangshan coal-bearing areas were mostly metamorphic bituminous coal and anthracite, , Low-metamorphic bituminous coal is the main coal-bearing area in Guyuan, and the degree of coal metamorphism in the Qingtongxia-Guyuan deep fault is obviously higher than that in the east. The analysis shows that the deep metamorphism is of universal significance to coal metamorphism of each age. On the basis of this, the thermal metamorphism and dynamic metamorphism of the magma are also the factors leading to the metamorphism and increase of coal metamorphism in some areas, such as the Rujigou Mining Area in Helan Mountain coal-bearing area, Hidden volcanic thermal influence, with Lingda mine field as the center, showing the northeast distribution of semi-annular banded coal-level zoning; Xiangshan coal-bearing area of ​​the coal distribution trend of the times consistent with the regional tectonic line, suggesting that may be deep Metamorphism superimposed magmatic thermal metamorphism and dynamic metamorphism.