厚煤层一次采全高导水裂缝带发育高度研究

摘要

为了顶板水的防治、采掘工程布置以及防水煤柱留设，需要确定煤层顶板导水裂缝带高度。以斜沟煤矿8＃煤层为例，应用数值模拟的方法对厚煤层综采一次采全高顶板导水裂缝带发育高度进行了研究。结果表明，数值模拟结果与现场钻探压水试验实测得到的导水裂缝带发育高度基本一致。综合确定导水裂隙带高度74．8 m，其中冒落带高度为32 m，裂隙带发育高度42．8 m．由此可见，《煤矿防治水规定》中关于导水裂缝带计算的经验公式不适用于斜沟矿，基于实测、模拟结果以及参考全国其他类似矿井实测结果，运用回归分析原理，建立了斜沟煤矿厚煤层综采一次采全高工作面顶板导水裂缝带发育高度计算公式。%In order to control the roof water,arrange mining engineering and Leave the waterproof coal pillars, the need to determine the height of water flowing fractured zone of coal seam roof.The 8 #coal seam in Xiegou Coal Mine as an example,by the method of numerical simulation for thick coal seam fully mechanized full seam mining roof water flowing fractured zone height was studied.The results show that the numerical simulation of water conductive fracture results and in -situ drilling water pressure test are basically consistent with the development of high.Integrat-ed 74.8 m determine the height of water flowing fractured zone,the caving zone height of 32 m,42.8 M.In height that development zone of crack,provisions of mine water prevention and control on empirical formula of water flowing fractured zone is not suitable for the Xiegou Coal Mine,based on the simulation results and measured,reference in other similar mines results by regression analysis,the principle,established the roof of fully mechanized working face in thick coal seam in Xiegou Coal Mine water flowing fractured zone height formula.