东胜煤田新胜勘查区煤层特征研究

Study on Coal Seam Characteristics in Xinsheng Exploration Area of Dongsheng District Coalfield

为分析新胜勘查区的煤层发育情况,开展了含煤地层沉积特征分析、主要煤层平面特征分析以及煤质特征分析。结果表明:勘查区主要含煤地层为延安组,含可采煤层7层;延安组含煤岩系是由陆源碎屑岩组成的陆相沉积地层,分为三个岩段;勘查区西部、中南及中北部煤层厚度较大,中部及东部煤层厚度较小,以中厚—厚煤层为主,整体厚度较为稳定;宏观煤岩类型以半暗型煤为主,显微煤岩类型为微镜惰煤;煤类以较低灰分、中镜质组、低阶烟煤的不黏煤为主,次为长焰煤;煤质为低灰、中高挥发分、特低硫-低硫、中高-高发热量煤。

To analyze the development of coal seam in Xinsheng exploration area,the sedimentary characteristics of coal-bearing strata,main coal seam plane characteristics and coal quality characteristics were analyzed.The results show that the main coal-bearing strata in the exploration area are Yan’an Formation with 7 recoverable coal beds,and the coal-bearing strata in Yan’an Formation are continental sedimentary strata composed of terrigenous clastic rocks,which are divided into three rock sections.The thickness of coal seams in the western,central southern,and central northern parts of the exploration area is relatively large,while the thickness of coal seams in the central and eastern parts is relatively small,with medium to thick coal seams being the main type,and the overall thickness is relatively stable;The macroscopic coal rock type is mainly semi dark coal,while the microscopic coal rock type is micro mirror inert coal;Coal is mainly composed of non cohesive coal with lower ash content,medium vitrinite,and low rank bituminous coal,followed by long flame coal;The coal quality is low ash,medium to high volatile matter,ultra-low sulfur-low sulfur,medium to high-high calorific value coal.