不同含气饱和度下煤岩力学性质变化研究

The Research of the Variation of the Mechanical Properties of Coal-rock in Different Gas-saturation

采用对比测井曲线计算结果和数学模型验证的方法,以成庄矿3号煤为研究对象,研究不同含气饱和度下煤岩力学性质(弹性模量、泊松比)的变化趋势。结果表明:含气饱和度对煤岩弹性模量影响较大,含气量较多时影响较为剧烈,弹性模量随着含气饱和度增加呈明显减小趋势,且相关性较好,规律性较强;同时随着含气饱和度增加泊松比减小,但减小趋势不明显,含气饱和度对煤岩泊松比的影响规律较复杂,相关性较差,规律性差。

By useing the count of the well-logging data and the way to proving the mathematical model, and with taking the 3# coal in Chengzhuang mine as the object of study, the variation trend of the mechanical properties of coal-rock （modulus of elasticity, Poisson＇s ratio）are researched in different gas-saturation. The result shows that the gas-saturation has a big influence on the modulus of elasticity, and the influence is considerable when there are more gases. The modulus of elasticity decreases obviously with the increase in gas-saturation, They have good interrelations, and the regularity is strong. The regularity of the influence that the gas-saturation has on the Poisson＇s ratio is more complex. , The Poisson＇s ratio decreases obviously with the increase in gas-saturation. They have a poor correlation and regularity.