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突出煤三轴蠕变特性及本构方程
  • 期刊名称:重庆大学学报
  • 时间:0
  • 页码:60-63
  • 语言:中文
  • 分类:TD452[矿业工程—矿山机电]
  • 作者机构:[1]重庆大学资源及环境科学学院,西南资源开发及环境灾害控制工程教育部重点实验室,重庆400030
  • 相关基金:国家重点基础研究发展计划(973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重点资助项目(CSTC,2008BA6028)
  • 相关项目:含瓦斯煤体变形局部化及耦合失稳破坏规律研究
中文摘要:

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≥σs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。

英文摘要:

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≥σs, 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 confinin pressure

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