中鸡南区煤与含(隔)水层组合类型分析

Analysis on combination types of coal and aquifer(aquiclude) in Zhongji south area

陕北煤矿区生态环境脆弱,煤炭的大量开采造成了地下水水位大幅下降、地面沉降等一系列的生态环境问题。研究表明,煤层赋存深度及其与含(隔)水层的组合特征,是采煤引发地下水水位下降等环境问题的主要因素。通过分析中鸡南区含(隔)水层的主要特征,参考地质填图及钻探资料,汇总了研究区5-2煤层(全区可采)上覆各岩层的分布、厚度及其组合关系。通过大量数据统计,将5-2煤层与上覆岩层组合类型划分为3种,论述了各类型的分布及特点,为下一步煤炭资源的合理开采和水资源的有效保护及利用提供了依据。

The eco-environment of the mining area in northern Shaanxi is fragile. The large-scale mining of coal has resulted in the decline of groundwater level,land subsidence and other eco-environmental problems. The research shows that the buried depth of coal seam and its combination with aquifer(aquiclude)are the main factors leading to the decline of groundwater level caused by coal mining. Through the analysis of the main features of aquifer(separated),geological mapping and drilling data in Zhongji south area,the distribution and thickness of overlying strata of No.5 -2 coal seam in the study area were summarized. According to data statistics,the combination types of No.5 -2 coal seam and overlying strata can be divided into three types,which provide the basis for the rational mining of coal resources and the effective protection of water resources.