Jinneng Holding Coal Industry Group Zheneng Majialiang Coal Industry Co., Ltd.

为探讨石炭系太原组煤层的煤质特征及其成煤古环境,研究收集了麻家梁矿9号煤层煤样,从煤样的物理性质、煤岩特征、煤样的化学性质和工艺性能等方面进行分析研究,确定其成煤时的沉积环境。研究结果表明:9号煤层位于石炭系太原组,其煤层厚度为0.79~20.53m,平均厚度为11.49m;其宏观煤岩类型以半暗型煤为主,其次为半亮型煤,暗淡型煤少量;显微煤岩组分以镜质组及惰质组为主,其次为半镜质组和壳质组。分析显微组分中镜质组含量与惰质组含量的关系,硫分中有机硫和无机硫(硫化铁硫和硫酸盐硫)含量的多少,煤灰成分中灰成分指数(K)、m(100*MgO/Al2O3)及n[CaO/(CaO+Fe2O3)]的大小,判定其沉积环境为受海水影响的泥潭沼泽的强还原性环境。

In order to discuss the Taiyuan Formation coal seam coal quality characteristics and its ancient coal forming environment in the Carboniferous system, coal samples from the No. 9 coal seam of Majialiang Mine are studied and collected, research and analysis are conducted from the aspects of physical properties, coal rock characteristics, chemical properties and process performance of the coal samples, etc, the sedimentary environment during coal formation is determined. The research results indicate that the No. 9 coal seam is located in the Taiyuan Formation of the Carboniferous system, with a coal seam thickness of 0.79-20.53 m and an average thickness of 11.49 m; The macroscopic coal rock type is mainly semi dark type coal, followed by semi bright type coal, with a small amount of dim type coal; The microscopic coal rock components are mainly composed of vitrinite and inertinite, followed by semivitrinite and exinite. Analyze the relationship between the content of vitrinite and inertinite in the microscopic components, the amount of organic sulfur and inorganic sulfur (iron sulfide sulfur and sulfate sulfur) in the sulfur content, the amount of the ash composition index (K), m (100*MgO/AlO), and n[CaO/(CaO+FeO)] in the coal ash composition, and determine that its sedimentary environment is a quagmire swamp strong reducing environment influenced by seawater.