A convenient and practical formula used to estimate the height water flowing fractured zone has been provided for underwater mining.

为煤矿进行水体下采煤提供了一种既方便又实用的预计顶板导水裂缝带高度公式。

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And the height of water flowing fractured zone in overburden strata is calculated by the empirical formula and is measured with a simple hydrological observation method according to drilling on spot.

用经验公式对覆岩导水裂隙带高度进行了计算，采用简易水文观测法对覆岩导水裂隙带高度进行了测定。

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And the height of water flowing fractured zone in overburden strata is calculated by the empirical formula and is measured with a simple hydrological observation method according to drilling on spot.

用经验公式对覆岩导水裂隙带高度进行了计算，采用简易水文观测法对覆岩导水裂隙带高度进行了测定。

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