利用自行研制改造的含瓦斯煤热流固耦合三轴渗流实验装置,以典型豫西“三软”构造煤原煤样为研究对象,轴向等应力循环加卸载作用下含瓦斯构造煤渗透率的影响。结果表明:煤样渗透率在轴向应力加载过程中减小,卸载过程中增大,渗透率与轴向应力在加卸载过程中符合负指数函数分布;渗透率无因次量与有效应力关系表明,渗透率无因次量对有效应力较为敏感,有效应力变大,渗透率无因次量降低速率变大,有效应力减小,渗透率无因次量会有所恢复;循环加载过程中,渗透率对于首次加载敏感性较强,渗透率损失较大。卸载过程中,渗透率恢复不到初始值。同时,循环加卸载过程使煤样塑性变形进一步增加,也使得渗透率对于有效应力的敏感度降低。 By using self-developed triaxial experimental device of coal-fluid-heat-fluid-solid coupling coupled with gas and coal, the typical coal samples from the west of Henan Province are taken as the research object. The permeability of gas containing coal and gas under cyclic loading and unloading Impact. The results show that the permeability of coal samples decreases during axial stress loading and increases during unloading, while the permeability and axial stress conform to the negative exponential distribution during loading and unloading; and the relationship between the dimensionless and effective stress It shows that the dimensionless amount of permeability is more sensitive to effective stress, the effective stress becomes larger, the rate of non-dimensional decrease of permeability becomes larger, the effective stress decreases, and the permeability will recover without any dimension; during cyclic loading , The permeability is more sensitive to the first loading and the loss of permeability is larger. During unloading, the permeability does not recover to its original value. At the same time, the cycle of loading and unloading process to further increase the plastic deformation of coal samples, but also makes the sensitivity of the permeability for effective stress decreases.