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裂隙辉绿岩蠕变试验及模型研究
Research on creep test and model of cracked diabase
投稿时间: 2017-04-26  最后修改时间: 2017-08-16
DOI:
中文关键词:  岩石力学  裂隙岩体  蠕变  改进非线性蠕变模型
英文关键词:rock mechanics  fractured rock  creep  improved nonlinear creep model
基金项目:国家重点研发计划项目(2016YFC0600704)资助 ; 国家自然科学基金(5157041488)、 (51404130)、(51474120)资助
作者单位E-mail
梁冰 辽宁工程技术大学 948705380@qq.com 
张涛 辽宁工程技术大学 852032995@qq.com 
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中文摘要:
      为研究裂隙岩体的蠕变特性,对红透山铜矿深部岩体(裂隙辉绿岩)制备的标准试样进行单轴压缩蠕变试验。试验结果表明,裂隙角度对辉绿岩的强度特征影响显著,单级加载过程中应力-应变关系接近线性,整个加载过程中弹性模量为变化值,裂隙角度为3?、28.9?、63.5?、82.4?的辉绿岩长期强度约为对应单轴抗压强度的68%~75%、59%~88%、61%~76%、56%~64%。将引入的裂隙塑性元件及非线性牛顿体与Burgers模型串联,采用该裂隙岩石复合元件蠕变模型对辉绿岩蠕变曲线进行辨识,根据试样蠕变试验数据及拟合结果对裂隙岩石复合元件蠕变模型进行改进,得到改进裂隙岩石复合元件蠕变模型,根据试验数据对改进蠕变模型进行拟合,拟合结果与试验曲线比较吻合。研究结果对不同裂隙角度辉绿岩蠕变特性具有一定的参考价值。
英文摘要:
      In order to study the creep characteristics of cracked rock mass, uniaxial compression creep tests were carried out on the standard specimens made of the deep rock mass (cracked diabase) in Hongtangshan copper mine. The test results show that the effect of fracture angle on the strength characteristics of diabase is significant. The stress-strain relationship is close to the linearity during the single-stage loading process. and the elastic modulus is the change value during the whole loading process, The long-term strength of diabase at the angles of 3 ?and 28.9 ?is about 68% ~ 75% and 59% ~ 88% of the uniaxial compressive strength. The crack plastic component and nonlinear Newton body were introduced in series with the Burgers model, The creep curves of diabase was fitted by using the creep model of cracked rock composite element, According to the creep test data and the fitting results, the creep model of cracked rock composite component was improved, and the improved creep model of fractured rock composite component is obtained, According to the experimental data, the improved creep model of cracked rock composite component is fitted, and the fitting results are in good agreement with the test curves. The results have certain reference value for the creep characteristics of diabase at different fracture angles.
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