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中文摘要：
将采空区看作多孔介质,利用渗流力学等理论推导出采空区渗透率及采空区渗流控制方程。利用数值模拟软件Fluent,以天池煤矿401工作面的相关基础参数模拟高抽负压对采空区瓦斯涌出和自燃“三带”影响规律。从模拟结果得出,抽采率随着高抽负压的增大而增加,但随着高抽负压的增大,抽采率增加幅度越来越小;高抽巷瓦斯浓度随着抽放负压升高而下降,但瓦斯抽放纯量是增加的。随着高抽负压的增加会使可能自燃“三带”宽度有所拉宽,但总体来说随着高抽负压的增大并没有使得采空区自燃“三带”与工作面的相对位置有明显的变化,为瓦斯抽放时火灾的防治提供理论依据。
英文摘要：
Taking gob as porous medium, the permeability and the seepage control equation of gob were obtained by using the theory of seepage mechanics. The simulation software Fluent was used to simulate the influencing laws of negative pressure at high pumping lane on ＂Three Zone＂ gas emission and spontaneous combustion based on the related parameters of 401 work face in Tianchi Mine. The numerical results showed that the extraction rate increased with high negative suction increased but the in crease rate was more and more small; gas concentration in high gas drainage roadway decreased while suction pressure increased but the pure amount of gas drainage increased; the width of ＂Three Zone＂ of spontaneous combustion would increase with high negative pressure pumping had been widened; but the increase of high pumping negative pressure did not change the location of spontaneous combustion in ＂Three Zone＂ and relative positions. The research provides a theoretical basis for the prevention and control of fire during gas drainage.
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