论文部分内容阅读
湘东南地区资汝煤田上三叠统为一套灰黑色砂质泥岩、细砂岩、中粗粒砂岩以及煤层等沉积组合,具有砂泥薄互层层理、斜波状层理、水平层理及大型交错层理等沉积结构。该地区沉积环境为潟湖三角洲,煤层主要发育于潟湖淤浅而成的泥炭沼泽。研究区西南方向发育煤层层数比北东向多,盆地边缘煤的灰分比盆地中心的高,而硫分含量却比盆地中心低,盆地中心煤质较好。
The Upper Triassic of the Ziru coalfield in southeastern Hunan is a sedimentary assemblage of gray-black sandy mudstone, fine sandstone, medium-coarse grain sandstone and coal seam with the characteristics of thin sand-mud interbeds, ramps, Large staggered bedding and other sedimentary structures. The sedimentary environment in this area is the lagoon delta. The coal seam is mainly developed in the peat swamp formed by the lagoon. In the southwestern part of the study area, there are more coal layers developed than north-eastward. The coal ash in the margin of the basin is higher than the basin center, but the sulfur content is lower than that in the basin center, and the coal quality in the basin center is better.