高家堡井田二盘区导水裂隙带高度实测研究

Measured Height of Water Flowing Fracture Zone in Second Panel of Gaojiabu Mine Field

为了查明煤层顶板导水裂隙发育规律,采用地面钻孔分段注水测试和钻孔窥视方法实测了高家堡井田204工作面和205工作面煤层顶板导水裂隙带发育高度。研究结果表明:(1)205工作面DT1钻孔位置煤层顶板导水裂隙带发育高度为327.75 m,裂采比25.81。(2)204工作面DT2钻孔位置煤层顶板导水裂隙带发育高度为197.85 m,裂采比35.33。(3)高家堡井田二盘区导水裂隙带实测结果丰富了黄陇煤田综放采煤覆岩破坏规律。

In order to investigate the development pattern of water flowing fractured zone in the roof,has used water injection and drilling observation methods in ground drills to determining the height of water flowing fractured zone in the roof of the 204 and 205 working faces of Gaojiabu minefield.The research results show that:(1)The height of water flowing fractured zone at the DT1 drilling position of the 205 working face is 327.75 m,and the ratio between the height of water flowing fractured zone and the mining height is 25.81.(2)The height of water flowing fractured zone at the DT2 drilling position of the 204 working face is 197.85 m,and the ratio is 35.33.(3)The determined results of heights of water flowing fractured zone in the second panel of Gaojiabu minefield has enriched the failure law of the overlying strata caused during fully-mechanized caving mining in Huanglong coalfield.