成煤沼泽环境约束下的陕北低阶煤氢氧元素特征

The characteristic of hydrogen and oxygen in low-rank coal In northern Shaanxi constrained by coal-forming environment

低阶煤是煤炭分质化利用的主要载体,但煤质的地质赋存规律认识有待进一步深化。本文以陕北低阶煤为对象,通过煤相分析发现:不同煤层的煤相特征存在一定差异,自下而上总体表现为成煤期泥炭沼泽的覆水深度逐渐加大、木本组织逐渐减少;覆水深度越深,煤中氢含量越高;木本组织越多,煤中氢含量越少、氧含量越高。

Low rank coal is the main subject for coal utilization,but the understanding of the geological occurrence laws of coal quality needs to be further deepened.This article takes low rank coal in northern Shaanxi as the object,and through coal facies analysis.It is found that there are certain differences in coal facies characteristics among different coal seams.From bottom to top,the overall performance is that the water cover depth of the peat swamp during the coal formation period gradually increases,and the woody tissue gradually decreases.The deeper the water cover,the higher the hydrogen content in coal;The more woody tissue there is,the less hydrogen and higher oxygen content in coal.