本文从生产型煤和型焦的需要出发，研究岩浆变质作用所形成的天然焦炭和高、中变质煤的显微结构。
The paper studies the microstructures of the cokeite and the high, middle metamorphic coal, formed by the metamorphism of magma in view of the need for producing moulding coal and coke.
部分熔融过程发生于鲜水河断裂早期活动的剪切熔融过程，岩浆作用之前可能发生过强烈挤压而产生了高压变质作用。
The partial melting was probably produced with early shear inching process of Xianshuihe fault belt, also occurred strong compression before the magmatism to produce the high-pressure metamorphism.
在区域变质的背景上，叠加了岩浆热变质作用，生气强度大。
Owing to magma thermal metamorphism superimposing on the regional metamorphosis, the intensity of gas generation is higher.
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