【摘要】 <正> 一、不同还原性腐植煤的基本特征在研究华北聚煤区东部晚古生代太原组（C₃）和山西组（P₁¹）煤性质差别及显微特征的基础上,作者认为除煤岩成分和变质程度外,还存在着影响煤质的第三个成因因素——还原性质。不同还原性质的腐植煤,在煤岩、化学等一系列煤质指标上有明显差别,与弱还原性煤相比,强还原性煤具有如下特征:更多还原

【Abstract】 This paper deals with an preliminary study and analysis on the relationship between the sedimentary environment of coal-bearing formations and coal-forming quality in China. These coal-dearing formations are lower Carboniferous, Middle Carboniferous,Upper Carboniferous, the Early Lower Permian,Late Lower Permian, Early Upper Permian; Upper Triassic,Lower and Middle Jurassic,Upper Jurassic-Lower Cretaceous and the Lower and Upper Tertiary.A large number of data have clearly shown that the third genetic factor affecting coal quality reductivity, not only is a geochemical feature of the coal deposits in coal-bearing formations during the Late Paleozoic Era in North China, but also can begenerally found in the humic coal seams in coal-bearing formations in different areas and ages in China. It also depends on the sedimentary environment.The data have also shown that the coal of egual-metamorphic degree (its reflectance drfference is less than 0.1%) and that of the same petrographic component are distinct or even quite different in chemical-technolgical character, particularly in caking property; even if the caking property of the coal with lower vitrite content is sometimes stronger tnan tnat with higher vitriee content in egual-metamorpnic degree. This fully shows the marked difference in the reductivity of humic coal.Researches have made clear that humic coals in coal-bearing formation alternating marine and continental facies (nearshore, littoral environment) are generally higher reductivity-type coal with high sulphur, richer iron and stronger caking property, whereas humic coals in coal-bearing formation of transitonal (delta plain environment) and continental facies ( farshore, fluvial or lacustrine environment ) are generally lower reductivity-type coal with low sulphur, lower iron and weak caking property.As a result of the study, the conclusion comes as follows:( 1 )In addition to the coal petrographical components and the degree of coal me-tamorphism, the third genetic factor, which reflects the influence of reductivity in geochemical characteristics of peat swamp sedimentary environment generally existed.( 2 )Generally speaking, high reductivity-type coal is of relatively high sulphur and iron, low silicon and aluminium and strong caking property; whereas low reductivity-type coal is of relatively low sulphur and iron, high silicon and aluminium and weak caking property.( 3 )Up till now, total sulphur content, ash composition content and vitrite caking property are three parameters which give a better expression of reductivity.(4 )The formation of various types of coal-forming reductivity depends more exactly on the sedimentary environment of the coal-bearing formation,but not on thir age.( 5 )The well developed the marine bed in coal-bearing formation is and the nearer to the underlying coal seam it is, the stronger tie reductivity of coal formation will be; therefore, the higher the index of sulphur content, ash composition and caking propery of these coals will be.On the basis of the above researches, it is suggested that the inner link amongsedimentary environment-type of coal-forming-characteristic of coal quality, maybe closely related to one another, and a rough genetic model can be constituted.更多还原