覆岩导水裂隙发育的影响因素分析

Analysis of factors for the water flowing fractured zone

为了揭示覆岩导水裂隙发育规律,在分析导水裂隙影响因素的基础上,利用正交试验确定各因素变化组合,用UDEC软件进行数值模拟试验,分析各因素变化下导水裂隙的发育情况。试验结果表明,关键层距承压含水层距离和关键层位置这两种因素最能影响导水裂隙的发育。各因素对裂隙发育影响重要性:关键层距四含距离>关键层位置>关键层破断步距>关键层间距。

The disturbance of overlaying strata, causing the water flowing fractured zone run through the aquifer, makes the accident between water - inrushing and rock - crushing happen from time to time. In order to reveal the development law of water flowing fractured zone, the combination of influencing factors which have been analyzed for the water flowing fractured zone is established, and then the different situation for the development of the water flowing fractured zone with different factors is discussed with the UDEC. The results showed that both the distance from the key stratum to the confined aquifer and the position of the key stratum influence the development of the water flowing fractured zone best. The arrangement of the factors for the water flowing fractured zone are the distance from the key stratum to the forth aquifer, the position of the key stratum, the breaking span of the key stratum and the interval of the key stratum which is orderly from the best to the worst.