淮北煤田徐广楼井田水文地质特征与矿井涌水量预计

HYDROGEOLOGICAL CHARACTERISTICS AND PREDICTED MINE INFLOW OF THE XUGUANGLOU WELL FIELD IN THE HUAIBEI COAL FIELD

在系统分析徐广楼井田新生界松散层、古近纪红层和二叠纪含煤地层含、隔水层特征以及矿井充水因素的基础上,结合淮北煤田区域水文地质特征,明确了各含水层之间的水力联系。指出了煤系砂岩裂隙水是矿井直接充水水源,松散层第四含水层砂层孔隙水和古近系砾岩孔隙裂隙水是主要补给水源,开采10-2煤层时,太原组灰岩可能发生底板突水。在留设防水煤柱条件下,矿井涌水量主要为二叠纪煤系砂岩裂隙水。采用水动力学法和生产比拟法预测了矿井涌水量。

Based on systematic analysis of the features of aquifers and aquicludes in the Cenozoic unconsolidated formation,Paleogene red bed and Permian coal-bearing stratum in the Xuguanglou well field,and of mine waterfilling factors,combined with regional hydrogeological characteristics of the Huaibei coal field,this paper defines the hydraulic connection between various aquifers,points out that coal-measure sandstone fracture water is the source of direct water filling in mine,and the pore water of sand layer of the fourth aquifer in unconsolidated formation and the pore and fracture water of the Paleogene conglomerate are the main supplemental sources,and floor water inrush may take place in the limestone of the Taiyuan Formation when coalseam10-2is being mined.Under the condition of leaving water-proof coal pillars,the water inflow in mine is mainly of the Permian coalmeasure sandstone fissure water.The mine inflow was predicted by using hydrodynamic method and production comparison method.