突出煤三轴蠕变特性及本构方程
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国家重点基础研究发展计划(937计划)资助项目(2005CB221502);国家自然科学基金重点资助项目(50534080);重庆市自然科学基金计划资助项目(CSTC2008BA6028)


Characteristics of triaxial creep and constitutive relationship of outburst coal
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    摘要:

    以松藻矿务局打通一矿原煤制备的型煤为研究对象,研究了该煤样在围压作用下的蠕变特性规律,分析了产生此蠕变规律的原因,回归得到该煤样蠕变的经验公式,运用广义西原蠕变模型描述了型煤蠕变的三阶段,并确定了相关参数。结果表明:在围压作用下,蠕变载荷满足σ≥σs时,型煤蠕变曲线具有完整的三阶段;拟合曲线可以数学表达实际型煤蠕变的前2个阶段;广义西原模型是可以表征围压作用下型煤蠕变三阶段的本构模型。

    Abstract:

    The creep characteristics of coal and rock under confining pressure in Songzao, P.R. China were studied. The experimental data were analyzed and discussed in detail. The characteristics of creep could be described by the generalized KB model after the experimental data were fitted. The parameters of the model were obtained. The results show that when the creep load was σ≥σs, the curve of coal and rock under confining pressure displayed three typical phases. In the first and second phases, the fitted curve was consistent with the test curve. Thus, the generalized KB model can describe the whole process of coal creep under confining pressure.

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尹光志,赵洪宝,张东明.突出煤三轴蠕变特性及本构方程[J].重庆大学学报,2008,31(8):946-950.

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