论文部分内容阅读
为了研究固体充填采煤充实率对控制导水裂隙带高度发育的影响,分析了固体充填采煤覆岩移动变形特征,借助等价采高理论套用经验公式对固体充填采煤不同充实率导水裂隙带高度进行预计。运用数值模拟软件,通过对不同充实率导水裂隙带高度的模拟,建立了固体充填采煤导水裂隙带高度新的预计方法,其结果与套用经验公式预计的结果相吻合。工业性实验表明:固体充填采煤可以有效控制覆岩移动变形,顶板岩层整体保持其完整性,在煤层采高为3.5 m,采空区充实率为85%时,导水裂隙带高度在10 m左右的范围内,实测与预计结果基本一致。
In order to study the effect of solid filling and coal filling rate on the control of the height of aqueduct, the characteristics of solid-filled overburden rock movement and deformation were analyzed. Based on the theory of equivalent height and the empirical formula, Fissure zone height is estimated. The numerical simulation software was used to simulate the height of water-filled fractured zone with different filling rates, and a new prediction method for the height of water-filled fractured zone in solid-filled coal was established. The result is in good agreement with the expected result of applying empirical formula. Industrial experiments show that solid-filled coal mining can effectively control the deformation of overlying strata, and the top rock strata maintains its integrity as a whole. When the height of coal seam is 3.5 m and the enrichment rate of goaf is 85%, the height of water-carrying fracture zone is 10 m or so, the actual measurement and the expected results are basically the same.