泸州狐狸坡独层子煤层一、二分层煤类差异原因

Cause of Differences between No.1 and No.2 Layers of the Ducengzi Coal Seam in the Hulipo Coal Mine, Luzhou

狐狸坡煤矿独层子煤层一、二分层间平均仅0.16m,但二者煤类不同。一分层属1/2中黏煤,二分层属1/3焦煤,变质程度相近,均属中变质的烟煤,而表征煤粘结性能的指标粘结指数(GR.I)则差别很大,致使二者煤类归属不同。研究认为造成该一、二分层煤类不同的主要原因,是两分层煤的粘结性能差别。究其原因,成煤作用后期环境不同导致煤岩组分差别,进而导致粘结性能差别。

The Ducengzi coal seam in the Hulipo coal mine is the major minable one which is divided into two layers. The distance between the first and second layers is very small, average of about 0.16 m. The Metamorphic grade of two layers is similar, both belong to medium metamorphic bituminous coal, however, their GR.I is quite different. Moreover, the two layers are different in coal type. The first layer is 1/2 medium coking coal, while the second layer is 1/3 coking coal. This paper believes that their difference in coal type results from behavior differences which are originated from sedimentary environment.