基于Burgers模型的软岩流变相似材料的研究

doi:10.13722/j.cnki.jrme.2017.1082

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摘要以精铁粉、重晶石粉和石英砂为骨料，酒精松香溶液为胶结剂，液压油为黏滞剂，研制出一种新型软岩流变相似材料(IBSRO)。通过正交试验，研究该相似材料各组成成分对其弹塑性参数和Burgers流变模型参数的影响。试验结果表明，该相似材料的单轴抗压强度?c，弹性模量E，泊松比?，黏聚力c，黏弹性模量E1，E2以及黏滞系数?1，?2均主要受酒精松香浓度和液压油含量影响；酒精松香浓度越大及液压油含量越小，?c，E，c，E1，E2，?1及?2越大，?越小；内摩擦角?主要受(铁粉+重晶石粉)/骨料及液压油含量影响，且两者越大，?越小；初始蠕变率、稳定蠕变率、衰减蠕变时间以及流变比例均随酒精松香浓度增大而减小，而随液压油含量增大而增大。该相似材料的常规弹塑性参数和流变参数的范围均与实际软岩相对应，可模拟软岩的瞬时力学特性与流变力学特性。最后，采用多元线性回归分析提出该材料配比的确定方法，并在软岩盾构斜井的流变模型试验中得到较好应用与验证。

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	储昭飞
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	李铁

关键词 ：岩石力学, 软岩, 流变, 相似材料, 正交试验, 模型试验

Abstract：A new rheological similar material of soft rock(IBSRO) was developed with the iron ore powder，barites powder and sand as aggregate，the solution of rosin and alcohol as glue，and the hydraulic oil as viscous agent. The effects of components of the similar material on the elastic-plastic parameters and Burger′s model parameters were investigated through orthogonal tests. The test results indicate that the uniaxial compressive strength(?c)，elasticity modulus(E)，Poisson?s ratio(?)，cohesion(c)，viscoelasticity modulus(E1，E2) and coefficient of viscosity(?1，?2) are all affected mainly by the rosin concentration and the content of hydraulic oil. The greater the rosin concentration and the smaller hydraulic oil content，the larger the values of ?c，E，c，E1，E2，?1 and ?2 and the smaller the values of μ. The internal friction angle(?) is mainly affected by the(iron ore powder + barite powder)/ aggregates and the content of hydraulic oil，and the larger the two factors，the smaller the value of ?. The initial creep rate，stable creep rate，primary creep time and rheological strain ratio all decrease with the rosin concentration，and increase with the hydraulic oil content. The range of elastic-plastic and Burger?s model parameters of the similar material corresponds to that of soft rock，which can be used to simulate the instantaneous and rheological properties of soft rock. Finally，the method of determining the ratio of the material components based the multivariate linear regression analysis is presented and is verified in the rheological model test on the shield shaft of soft rock.

Key words： rock mechanics soft rock rheology similar material orthogonal test model test

引用本文:

储昭飞，刘保国，孙景来，沈君，宋宇，李铁. 基于Burgers模型的软岩流变相似材料的研究[J]. 岩石力学与工程学报, 2018, 37(5): 1185-1198.
CHU Zhaofei，LIU Baoguo，SUN Jinglai，SHEN Jun，SONG Yu，LI Tie. Research on rheological similar material of soft rock based on Burgers model. , 2018, 37(5): 1185-1198.

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http://www.rockmech.org/CN/10.13722/j.cnki.jrme.2017.1082 或 http://www.rockmech.org/CN/Y2018/V37/I5/1185

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