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基于HCA的细尾矿砂破坏准则试验研究
Experimental Study on Failure Criterion of Fine Tailings Sand Based on HCA
投稿时间: 2017-06-26  最后修改时间: 2018-04-01
DOI:
中文关键词:  细尾矿砂  破坏准则  空心圆柱扭剪仪  子午平面  π平面  中主应力
英文关键词:Fine tailings sand  Failure criterion  Hollow cylinder apparatus  Meridian plane  π-plane  Intermediate principal stress
基金项目:国家自然科学基金项目(面上项目,重点项目,重大项目)
作者单位E-mail
林雪松 辽宁工程技术大学 lxs488@qq.com 
陈殿强 辽宁有色勘察研究院  
王来贵 辽宁工程技术大学  
张亮 辽宁有色勘察研究院  
赵龙 辽宁工程技术大学  
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中文摘要:
      为研究细尾矿砂破坏准则的具体形式,通过对空心圆柱扭剪仪基本公式推导的方法得出了试验应力路径所需的计算公式;在自行研发的辅助仪器配合下,利用空心圆柱扭剪仪试验的方法测试了细尾矿砂子午平面、π平面上的破坏曲线和不同静水压力下中主应力对各个主应变的影响。结果表明:子午平面上的破坏曲线特点为广义剪应力随静水压力单调递增;π平面破坏曲线在静水压力较小状态与Mohr-Coulomb准则一致,较大状态与Drucker-Prager准则一致,两种状态静水压力分界点应位于为200~300kPa内,破坏准则是否与中主应力有关取决于中主应力对整体应变的影响水平。细尾矿砂的破坏准则应为Mohr-Coulomb与Drucker-Prager准则的组合。
英文摘要:
      In order to study failure criterion of fine tailings sand, the equations needed by experimental stress path were acquired by method of derivation of hollow cylinder apparatus' basic formulas; by method of hollow cylinder apparatus experiment under assistance of self-designed devices, failure curves of meridian plane and π-plane were tested; influence of intermediate principal stress to all the principal strain was tested. The results show that failure curves of meridian plane are all monotonic increasing ones; failure curves of π-plane are in accord with Mohr-Coulomb criterion under situation of small hydrostatic pressure and in accord with Drucker-Prager criterion under situation of big hydrostatic pressure, the cut-off point of hydrostatic pressure should between 200 and 300kPa, whether failure criterion is concerned with intermediate principal stress is determined by influence level of intermediate principal stress to the whole strain. Failure criterion of fine tailings sand should be the combination of Mohr-Coulomb and Drucker-Prager criterion.
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