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对湖南二叠纪含煤地层沉积环境和聚煤规律研究以后认为，梁山段煤层主要形成于障壁海中的障壁岛环境，而辰溪段煤层形成于潮上泥坪（武陵山区）及海湾（雪峰山区）环境，分布于湘中南区的龙潭组，其上、下段间由不整合面分开，分属不同时代形成，下段（不含煤段）属早二叠世晚期，上段（含煤段）属晚二叠世早期，煤层形成于近海湖泊和三角洲环境
After studying the sedimentary environment and coal accumulation law of the Permian coal-bearing strata in Hunan Province, it is considered that the coal seam of Liangshan section is mainly formed in the barrier island environment in barrier sea, while the coal seam of Chenxi section is formed in the mudflat (Wuling Mountain) and Bay Area) environment, which is distributed in the Longtan Formation in central-southern Hunan. The upper and lower sections are separated by unconformities and belong to different epochs. The lower section (without coal section) belongs to the late Early Permian. The upper section (coal-bearing section) In the late Late Permian, the coal seam formed in the offshore lakes and delta environment