为了研究负压对煤体瓦斯流动的影响,对实验室和现场2种情况下的研究结果进行了对比分析。通过实验室试验研究了不同条件下负压对煤样渗流的影响。现场实测了不同负压下的钻孔瓦斯浓度,浓度随负压的增大而增大,达到一定值后,浓度开始下降,并通过瓦斯浓度分析,确定了合理的负压。 In order to study the effect of negative pressure on gas flow in coal, the results of two kinds of laboratory and field experiments are compared and analyzed. The influence of negative pressure on the seepage of coal samples under different conditions was studied through laboratory experiments. The measured borehole gas concentration under different negative pressures was measured on the spot. The concentration increased with the increase of negative pressure. After a certain value was reached, the concentration began to decrease. Through the gas concentration analysis, a reasonable negative pressure was determined.