甘肃省周寨南煤1沉积环境及煤质研究

Research on Sedimentary Environment and Coal Quality of the Coal 1th in Zhouzhainan of Gansu Province

周寨南井田位于鄂尔多斯西南部,该区构造较复杂,煤层分叉合并突变现象非常显著。煤1为该区重要开采煤层,研究煤1赋煤规律、沉积环境分析和煤质研究显得非常重要。通过沉积环境分析认为,该区中侏罗统延安组的岩性及沉积相皆可划分为五个规模及厚度不等的沉积旋回,煤1沉积在延安组第三段前期的Ⅳ旋回沉积期。通过测试数据研究该井田煤1物理性质、化学性质以及工艺性能得知,可采煤层煤1煤质属低灰、低硫、中高发热量不黏煤,初步评价煤的主要利用方向为动力用煤、化工用煤和民用煤。

Zhouzhainan mine field is located in the southwest of Ordos.The structure of this area is relatively complex,and the phenomenon of coal seam cross merging and sudden changes is very significant,while the coal 1th layer is an important mining coal seam in this area.It is very important to study the coal bearing law,sedimentary environment analysis,and coal quality research of the coal 1th.Through sedimentary environment analysis,it is believed that the lithology and sedimentary facies of the Middle Jurassic Yan'an Formation in this area can be all divided into five sedimentary cycles of varying scales and thicknesses,the coal 1th is deposited during the IV cycle sedimentation period in the early stage of the third section of the Yan'an Formation.Through the study of test data on the physical and chemical properties,as well as the process performance of the coal 1th in the mine field,it is found that the coal quality of the coal 1th in the minable coal seam belongs to low ash,low sulfur,medium to high heat generation non stick coal.The preliminary evaluation shows that the main utilization directions of coal are power used coal,chemical used coal,and civilian used coal.