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在某矿巨厚含水冲积层下,有三种不同产状的煤层。在开采过程中,它们的涌水特点也各不相同:急倾斜煤层,导水裂隙带发育比较快也比较高,涌水量变化曲线比较陡。缓倾斜煤层,导水裂隙带发育比较慢比较低,涌水量变化曲线比较缓。因此,不同产状的煤层,其防水煤(岩)柱的大小应不相同。另外,通过试验,还证明了合理的采用间歇性开采方法,可显著地减少矿坑涌水量。
Under the huge aquifer alluvium of a certain mine, there are three kinds of seam with different occurrences. During the mining process, their gushing characteristics are also different: steeply inclined coal seam, water-conducting fractured zone develops relatively fast and relatively high, and the variation curve of water inflow is relatively steep. In gently inclined coal seam, the development of water-conducting fracture zone is relatively slow and the variation curve of water inflow is relatively slow. Therefore, the different occurrences of coal, waterproof coal (rock) column size should be different. In addition, through the test, it is also proved that the rational use of intermittent mining methods can significantly reduce the amount of mine water inrush.