红庆河煤矿煤层顶板含水层沉积规律研究

摘要

According to the characteristics of formation and logging data of the boreholes in Hongqinghe Coal Mine, the strata in the study area were re-divided, and the sedimentary law of the strata was studied combining with the mark of the sedimentary facies. The results show that the 3th section of Yanan formation is mainly composed of delta plain subfacies, developing three near the north-south rivers and two near the north-east rivers with the ratio of sandstone thickness to formation thickness greater than 0.4 at distributary channel, and the 1st and 2nd section of Zhiluo formation were mainly composed of braided river and riverbed and flood plain of sedimentary subfacies developing several near the northwest-southeast rivers with the ratio of sandstone thickness to formation thickness between with 0.6 and 0.8 at river center. The results can provide a basis for the evaluation of water abundance later.%根据红庆河煤矿地层发育特征以及钻孔测井曲线等资料,对研究区的地层进行了重新划分,结合地层沉积相的标志,研究了地层的沉积规律.结果表明:延安组三段主要为三角洲平原亚相沉积,发育三条近南北向的河道和两条近北北东向河道,分流河道处砂地比值均大于0.4;直罗组一段和直罗组二段主要为辫状河沉积,沉积亚相为河床、泛滥平原,河道呈北西—南东向展布,河道中心的砂地比值0.6~0.8之间,此结果可为后期地层富水性评价提供依据.