贵州省比德向斜北西端勘查区煤岩煤质特征分析

Analysis of coal rock and coal quality characteristics of north west exploration area of Bide syncline in Guizhou Province

本文根据比德向斜的地质勘查资料和取样化验结果,分析比德向斜北西端二叠系可采煤层宏观煤岩类型及显微煤岩特征,原煤、浮煤水分、灰分、挥发分、硫分、固定碳、发热量的特征及灰分、硫分变化规律,为研究其煤炭资源的高效、洁净利用提供依据。结果表明,勘查区可采煤层煤的化学性质稳定,成煤环境也较稳定;煤灰成分中Fe_(2)O_(3)含量相对较高的3、4、14号煤层中的硫有很大一部分富集在黄铁矿中,同时,降硫率也较高。5、6、31号煤层软化温度、流动温度也较高,主要是Al_(2)O_(3)的贡献;煤类主要为无烟煤三号,埋深对煤化程度起主导作用;其发展方向拟为煤-电-化。

According to the geological exploration data and sampling test results of the Bide syncline,analyze the macro-coal rock types and micro-coal rock characteristics of the mineable coal seam at the north west end of the Bide syncline,as well as the characteristics of raw coal,float coal moisture,ash,volatile content,sulfur content,fixed carbon,calorific value and the change law of ash content,sulfur content,which provides a basis for the study of the efficient and clean utilization of coal resources.The results show that the chemical properties of the mineable coal seams in the exploration area are stable,and the coal-forming environment is also relatively stable;a large part of the sulfur in the coal seams 3,4 and 14 with relatively high Fe_(2)O_(3) content in the coal ash component is enriched in pyrite,the sulfur reduction rate is also higher.The softening temperature and flow temperature of coal seams 5,6 and 31 are also higher,mainly due to the contribution of Al_(2)O_(3);the coal is mainly anthracite No.3,and the burial depth plays a leading role in the degree of coalification;its development direction is planned to be coal-electricity-chemical.