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利用Fluent数值模拟软件对王庄矿8101工作面高位钻孔抽采时的不同终孔间距与钻孔个数时的抽采纯量、上隅角瓦斯浓度进行数值模拟,并对不同终孔间距与不同钻孔个数时的抽采纯量、上隅角瓦斯浓度进行分析。分析结果表明:随着终孔间距的增加,抽采纯量呈现先增加后减小的趋势,并确定2个钻孔时终孔间距为6 m时的抽采纯量最大,上隅角瓦斯浓度呈现先减小后增加的趋势;随着钻孔个数的增加,抽采纯量逐渐增加,但抽采纯量的增加量逐渐减小,上隅角瓦斯浓度逐渐减小,但上隅角瓦斯浓度的减少量逐渐减小。
Fluent numerical simulation software was used to simulate the gas purity of drawdown and top corner gas at the different hole spacing and hole number of drill hole at the top of the 8101 working face in Wangzhuang Mine. With the number of different drilling pumping capacity, upper gas angle analysis. The analysis results show that with the increase of the distance between the final holes, the volume of extraction increases at first and then decreases, and it is determined that when the distance between two holes is 6 m, the pumping capacity is the largest. The upper corner gas With the increase of the number of boreholes, the pure amount of extraction increased gradually, but the increment of extraction puree gradually decreased and the concentration of gas in the upper corner gradually decreased, while the upper corner The decrease of gas concentration gradually decreases.