榆林矿区厚松散层矿井水文地质特征与井筒涌水分析

Analysis on Hydrogeological Characteristics and Shaft Water Inflow in Thick and Loose Strata of Yulin Mining Area

西北地区地质结构和岩层含水条件不同于东部地区。为研究榆林矿区厚松散层和砂层地质结构条件下的矿井涌水情况,以袁大滩煤矿为工程背景,分析了矿井水文地质特征,计算了井筒涌水量,对矿井涌水进行了评价。结果表明:矿井岩层裂隙丰富,上覆松散层含水层和砂岩含水层较厚,对井筒安全使用存在威胁;主斜井、副斜井、进风立井和回井立井的井筒涌水量分别为243m^3/h、388m^3/h、1409m^3/h和1388m^3/h;袁大滩煤矿比榆阳煤矿、榆树湾煤矿的井筒涌水量大,进风立井涌水量特别显著,在开采过程中应该加强防水措施。

The geological structure and rock formation water conditions in the northwestern region are different from those in the eastern region.To study the mine water in the thick loose layer and sand layer geological structure of Yulin mining area,we took Yuandatan Coal Mine as the engineering background.The hydrogeological characteristics of the mine were analyzed.The amount of water in the wellbore was calculated.The mine water inflow was evaluated.The results showed that the fractures in the rock formation are rich.The overlying loose aquifer and sandstone aquifer were thick,which poses a threat to the safe use of the wellbore.The water inflow from the main inclined shaft,the auxiliary inclined shaft,the inlet shaft and the return shaft were 243m^3/h,388m^3/h,1409m^3/h and 1388m^3/h,respectively.Yuandatan Coal Mine had a large amount of water in the wellbore of Yuyang Coal Mine and Yushuwan Coal Mine.The amount of water in the intake shaft was particularly significant,and waterproof measures should be strengthened during the mining process.