坚固性系数对构造煤应力-应变及瓦斯渗透性影响

Effect of Firmness Coefficient on Tectonic Coal Gas Permeability and Stress-strain

摘要: 在三轴渗流仪的基础上自主研发出一种气固耦合三轴伺服渗流实验装置，以坚固性系数f小于0.5的原煤试件为研究对象，结果表明：坚固性系数在0.26～0.48范围内的松软构造煤在应力-应变加载过程中同样经历了5个阶段，然而在坚固性系数较小时则表现为应力跌落范围的逐渐减小或消失；从同一矿区制取的原煤试件瓦斯渗透率随着坚固性系数的增加而增大，且符合二次多项式K=af²+bf+c。
- 构造煤 /
- 坚固性系数 /
- 应力-应变 /
- 瓦斯渗透率 /
- 数值拟合
Abstract: On the basis of the tri-axial stress measurements, a gas-solid coupling tri-axial stress servo seepage experimental device is developed; taking the raw coal sample that the firmness coefficient f is less than 0.5 as the research object, the results show that the firmness coefficient of the soft tectonic coal in the range of 0.26 to 0.48 also experiences five stages in the process of stress and strain loading, however, when the coefficient of firmness is relatively small, it shows that the drop range of stress decreases or disappears gradually; the gas permeability of raw coal samples from the same mining area increases with the increase of the firmness coefficient, and in line with the quadratic polynomial K=af²+bf+c.
- tectonic coal /
- firmness coefficient /
- stress-strain /
- gas permeability /
- numerical coupling

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