为防治顶板水、防水煤柱留设而需合理确定顶板"三带"高度。以西山镇城底矿8煤为研究对象,采用井下仰孔注水测渗漏法和瞬变电磁法实测导水裂缝带高度,运用FLAC3D软件对上覆岩层的冒落、岩移规律进行了数值模拟。结果表明:数值模拟与现场实测得到的导水裂缝带基本一致,综合确定导水裂缝带高57.58 m,其中冒落带高16.32 m,裂缝带高41.26 m,说明《煤矿安全规程》中有关导水裂缝带统计经验公式不适用于中厚煤层综采一次采全高开采条件。

In order to prevent and contral the roof water,to leave the water prevention coal pillars,rationally set the height of the "three zones" in the roof,taking No. 8 seam in Chengdi Mine of Xishan Town as a study object,an underground mine water injection leakage measuring method with overhead borehole and a transient elect romagnetic method were applied to measure the height of the water flow crack zone.The FLAC3D software was applied to the numerical simulation on the roof falling of the overburden strata and the strata migration law.The results showed that the water flow crack zone height of the numerical simulation and the site measurement was basically the same.The water flow crack zone height was set as 57 .58 m,the falling zone height was 16.32 m and the crack zone height was 41.26 m.Thus the statistic e xperience formula of the water flow crack zone stipulated in Mine Safety Regulations would be not suitable for the mining conditions of the fully mechanized one passin g full seam mining face in the medium thick seam.

国家自然科学基金资助项目(51074075,41072188)；“十二五”国家科技支撑计划资助项目(2012BAK04B00)；河北省自然科学基金资助项目(E2012508001)；