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本文以大量的野外观察和室内分析资料,说明淮北新矿区第四含水层是由粘性土和砂性土交替出现复合结构的含水层,其厚度受基岩古地形控制,空间位置在-190m以下,砂层在水平方向上常分岔尖灭,碎屑颗粒磨圆度和分选性均较差。由于物源区的不同,第四含水层中砾石成分和形态特征有明显差异。依据古生物和岩矿的综合研究认为,沉积区属干旱亚热气候环境。最后经综合环境判别,提出第四含水层是属于在内陆干旱亚热环境中,发育在冲积扇上以泥石流或泥流为主,河床或漫流为辅的沉积。
In this paper, a large number of field observations and laboratory analysis of data shows that the fourth aquifers in Huaibei new mining area is composed of cohesive soil and sandy soil alternating aquifer complex structure, the thickness of the bedrock by the ancient terrain control, the spatial location below -190m , The sand layer is often bifurcated in the horizontal direction, and the detritus and separation of detritus particles are poor. Due to the different source areas, the composition and morphological characteristics of gravel in the fourth aquifer are obviously different. According to the comprehensive study of paleontology and rock and mineral resources, the sedimentary area is arid and sub-climatic environment. Finally, based on the comprehensive environmental discrimination, it is proposed that the fourth aquifer belongs to the sediment, which is dominated by debris flow or mud flow in the alluvial fan and supplemented by the riverbed or stream in the inland arid subtropical environment.