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以地表水为主要充水水源的涌水特征 | 2011-9-26 10:11:00
以地表水为主要充水水源的涌水特征
地表水充水矿床的涌水规律有:
(1)矿井涌水动态随地表水的丰枯作季节性变化,且其涌水强度与地表水的类型、性质和规模有关。受季节流量变化大的河流补给的矿床,其涌水强度亦呈季节性周期变化,有常年性大水体补给时,可造成定水头补给稳定的大量涌水,并难于疏干。有汇水面积大的地表水补给时,涌水量大且衰减过程长。
(2)矿井涌水强度还与井巷到地表水体间的距离、岩性与构造条件有关。一般情况下,其间距愈小,则涌水强度愈大;其间岩层的渗透性愈强,涌水强度愈大。当其间分布有厚度大而完整的隔水层时,则涌水甚微,甚或无影响;其间地层受构造破坏愈严重,井巷涌水强度亦愈大。
(3)采矿方法的影响。依据矿床水文地质条件选用正确的采矿方法,开采近地表水体的矿床,其涌水强度虽会增加,但不会过于影响生产;如选用的方法不当,可造成崩落裂隙与地表水体相通或形成塌陷,发生突水和泥沙冲溃。
- 上一篇:以地下水为主要充水水源的矿床
- 下一篇:大气降水为主要充水水源的涌水特征

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