为探究抽采负压对破碎煤体内气体渗流特性的影响，采用自行设计的负压抽采模拟渗透试验系统，对负压影响下不同级配破碎煤体内气体渗流规律展开了研究；并对该过程气体能量损耗及表观渗透率关于受负压影响的敏感性问题进行了分析。结果表明：随着负压的增大，同一孔隙结构下气体渗透状态的非Darcy效应相较于Darcy效应表现得更加突出，但随Talbol级配系数的增大其内部孔隙增大，两者之间的界限出现淡化，相关系数开始接近；通过引入惯性-湍流修正系数$ delta $来对不同孔隙结构下气体能量损耗进行表征，整体随的增大呈现减小趋势，当处于0.2~0.6阶段内$ delta $处于不稳定的阶段，而在>0.6之后$ delta $数值基本稳定，即随着孔隙结构的增大气体渗流能量损耗降低，趋向于Darcy渗流；在负压小于60 kPa时，不同级配试样的负压敏感曲线之间变化差异显著，而当负压大于60 kPa后，各条曲线相互靠拢，且值越大负压敏感曲线偏离度越低，即负压较小时表观渗透率更易受负压影响；孔周破碎煤体渗透率在抽采负压较小时易受其孔隙结构影响，在孔隙结构及抽采负压较小时往往呈现出非Darcy渗流，造成抽采不畅等问题影响抽采效率。

In order to investigate the influence of negative pressure on the gas seepage characteristics in crushed coal, a self-designed negative pressure pumping simulation permeability test system was used to study the gas seepage law in different grades of crushed coal under the influence of negative pressure. The sensitivity of gas energy loss and apparent permeability in this process to the influence of negative pressure was analyzed. The results show that: with the increase of negative pressure, the non Darcy effect of gas permeability under the same pore structure is more prominent than the Darcy effect. However, with the increase of Talbol grading coefficient, the internal pores increase, and the boundary between the two becomes blurred, and the correlation coefficient begins to approach. By introducing an inertia turbulence correction coefficient to characterize the energy loss of gas under different pore structures, the overall trend decreases with the increase of.is in an unstable stage whenis between 0.2 and 0.6, and after>0.6, the numerical valueis basically stable, that is, as the pore structure increases, the energy loss of gas seepage decreases, tending towards Darcy seepage; when the negative pressure is less than 60 kPa, there is a significant difference in the changes in the negative pressure sensitivity curves of samples with different gradations. However, when the negative pressure is greater than 60 kPa, the curves close to each other, and the larger thevalue is, the lower the deviation of the negative pressure sensitivity curve is. That is, when the negative pressure is smaller, the apparent permeability is more susceptible to negative pressure. The permeability of fractured coal bodies around holes is easily affected by their pore structure when the negative pressure of extraction is low. In terms of pore structure and extraction negative pressure, non Darcy seepage often appears, causing problems such as poor extraction and affecting extraction efficiency.