固体充填采煤导水裂隙带发育规律分析

Development Regularity of Water-flowing Fractured Zone in Solid Backfill Coal Mining

以山西某矿CT101工作面为例,采用UDEC软件建立数值计算模型,得出了不同充实率下导水裂隙带的发育高度。当充实率从60%上升到80%时,导水裂隙带发育高度从27.1m减低至14m,减小了48%,表明增大充实率能有效减小导水裂隙带发育高度。用等价采高代入经验公式的计算结果与模拟结果基本一致,现场实测数据得出的注水漏失量图表明,在80%充实率下,钻孔垂直深度16.4 m为导水裂隙带发育高度位置。

Based on the CT101 working face of a mine in Shanxi,the numerical calculation model was established by UDEC,and the developmental height of water-flowing fractured zone under different filling ratios was obtained.The height of water-flowing fractured zone decreased by 48%from 27.1 mto 14 m when the filling ratio increased from60%to 80%,which showed that increasing filling ratio can significantly decrease the height of water-flowing fractured zone.Substituting the equivalent mining height into an empirical formula,the calculated result was in agreement with the simulated result.The water leakage graph from field data showed that when the filling ratio was 80%,the vertical depth of borehole,equal to 16.4m,was the height of waterflowing fractured zone.