王洼矿区8^#煤层煤质特征及成煤环境分析
高小龙¹，王高皓¹，罗成云²，吴向斌²，马秀军¹，白建军¹
（1.宁夏回族自治区煤炭地质局，宁夏 银川 750000；2.宁夏王洼煤业有限公司，宁夏 固原 756000）
摘要： 通过对王洼矿区8^#煤层7 个勘查报告中的煤质资料进行分析，发现研究区的沉积环境对其煤岩特征和化学特
征控制程度较高。研究发现：在延安组初期，8^#煤层主要在浅湖三角洲体系下形成，这个阶段的沉积环境相对较稳定；
在延安组后期，受到古河流的冲刷影响，沉积环境由浅湖三角洲体系转变为河流体系，在古河流的冲刷下，8^#煤层的硫
分、灰分和显微组分的分布具有一定的变化；在燕山运动后期，西侧沉积边界逐渐抬升，煤层埋深西高东低，随着埋深
的增加，挥发分逐渐降低。对王洼矿区8^#煤层的煤质资料进行分析后，对成煤环境有了一定的认识，得出王洼矿区8^#煤
层煤岩特征和化学特征受到沉积环境控制的结论。
关键词： 煤质特征；沉积环境；王洼矿区
中图分类号： P618.11      文献标志码： A      文章编号： 2095-0802-(2023)10-0030-04
Coal Quality Characteristics and Coal-forming Environment of 8# Coal Seam in
Wangwa Mining Area
GAO Xiaolong¹, WANG Gaohao¹, LUO Chengyun², WU Xiangbin², MA Xiujun¹, BAI Jianjun¹
(1. Coal Geology Bureau of Ningxia Hui Autonomous Region, Yinchuan 750000, Ningxia, China; 2. Ningxia Wangwa Coal
Industry Co., Ltd., Guyuan 756000, Ningxia, China)
Abstract: Through the analysis of coal quality data in seven exploration reports of 8^# coal seam in Wangwa mining area, it is
found that the sedimentary environment in the study area has a high degree of control over its coal-rock characteristics and
chemical characteristics. It is found that the 8# coal seam was mainly formed in the shallow lake delta system at the early stage of
Yan'an Formation, and the sedimentary environment at this stage is relatively stable; in the late Yan'an Formation, the
sedimentary environment changed from a shallow lake delta system to a river system due to the erosion of the ancient river; under
the erosion of the ancient river, the distribution of sulfur, ash and maceral in the 8^# coal seam changed to a certain extent; in the
late Yanshan movement, the sedimentary boundary on the west side gradually rose, and the buried depth of coal seam was higher
in the west and lower in the east, with the increase of buried depth, the volatile content gradually decreased. After analyzing of
coal quality data of 8# coal seam in Wangwa mining area, a certain understanding of the coal-forming environment has been
gotten, and the conclusion is drawn that the coal rock characteristics and chemical characteristics of 8# coal seam in Wangwa
mining area are controlled by the sedimentary environment.

Key words: coal quality characteristics; sedimentary environment; Wangwa mining area