贵州大竹坝井田含煤地层及煤层特征分析

摘要

Geology,structure characteristics and occurrence of coal seams in Dazhuba coal field in Tongzi county of Guizhou province were introduced,the coal-bearing strata and coal seam characteristics were analyzed,and the characteristics and change rule of coal seams were elaborated. The results showed that the coal-bearing strata of Dazhuba coal field so the C3 coal seam was the Longtan formation of the Upper Permian series,it had 3 minable seam,and C3 coal seam was the main minable seam,while C2 and C4 seams were partly minable. The thickness variation of C3 coal seam was not obvious,there was a single type of coal and the structure of seam was relatively simple,So the C3 coal seam was a relatively stable coal seam. Its estimator of proven coal resources was 83.39 million tons,which was a medium-sized coal field. According to coal quality laboratory test results,the industrial type of C3 coal was char-acterized by meager lean coal with medium ash content,medium-high sulfur content,low phosphorus content and high calorific value.%介绍了贵州省桐梓县大竹坝井田地质概况、构造特征和煤层赋存情况,分析了井田内含煤地层及可采煤层特征,阐述了煤层特征及其变化规律。研究表明,井田内含煤地层为上二叠统龙潭组,可采煤层3层,其中 C3为主采煤层,C2、C4零星局部可采。井田内C3煤层厚度变化规律不明显,煤类单一,煤层结构较简单,属于较稳定类型煤层；估计探明煤炭资源量8339万t,为一中型井田；根据煤质化验结果,确定 C3煤层煤岩的工业类型为中灰、中高硫、低磷、高热值贫瘦煤。