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Journal of the Geological Society of India

, Volume 92, Issue 1, pp 111–119 | Cite as

Formation Environment of Main Brown Coal Seam in Xi-2 Minefield of Shengli Coalfield Based on Coal Ash Phase Analysis

  • Boyang Wang
  • Yong Qin
  • Jian Shen
  • Gang Wang
  • Jiuqing Li
Article
  • 23 Downloads

Abstract

The formation environment of the main coal seam in Shengli coal mine is analyzed, and the effect of coal ash parameters on the coal-forming environment is mainly discussed according to gray component parameters combined with other coal quality test analysis data. Results show that the hydrodynamic conditions of the main coal during coal accumulation have a general pattern of strong northeast and weak southwest, and lakeside swamp is generally in the retrograde process from south to north. The No.5 coal seam is a water entry cycle, and the No.5lower coal is a water withdrawal cycle. The No.6 thick coal seam is formed in the peat swamp environment where the water is shallow and the groundwater activity is weak. The input of terrestrial debris material was most abundant in the formation period of No.5lower coal, followed by No.5 coal, and that in No.6 coal is the least. Vertically, the peat swamp environment changed from weak reduction to weak oxidation to strong reducing environment. The ash yield was low to high to low from bottom to top. The organic sulfur is the main type of sulfur in the main coal seam. The weaker the hydrodynamic condition, the higher the organic sulfur content in the reduction environment, while lower organic sulfur content in the oxidation environment. The peat swamp water of No.5lower coal is medium alkaline, and the peat swamp water of No.5 and No. 6 coals is weakly alkaline or acidic.

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Copyright information

© Geological Society of India 2018

Authors and Affiliations

  • Boyang Wang
    • 1
    • 2
  • Yong Qin
    • 1
    • 2
  • Jian Shen
    • 1
    • 2
  • Gang Wang
    • 3
  • Jiuqing Li
    • 1
    • 2
  1. 1.Key Laboratory of Coalbed Methane Resources and Reservoir Formation Process of the Ministry of EducationChina University of Mining and TechnologyXuzhouChina
  2. 2.School of Resources and GeosciencesChina University of Mining and TechnologyXuzhouChina
  3. 3.Key Laboratory of Resource Survey and Research of Hebei ProvinceHebei University of EngineeringHandanChina

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