钙芒硝盐岩多场耦合作用下蠕变的温度效应研究
TD315; 为了研究温度-溶浸-应力耦合作用下钙芒硝盐岩蠕变的温度效应,利用自主研发的三轴岩石力学试验机,进行了围压4 MPa、轴压5 MPa、不同温度(30,60,90℃)、不同渗透压(3,2,1 MPa)条件下的三轴蠕变试验,并在试验前后对试件进行CT扫描,分析了不同蠕变过程中温度对钙芒硝蠕变变形的影响.结果 表明:溶浸连通过程,对钙芒硝盐岩蠕变变形起主要作用的是渗透压和温度,渗透压越小且温度越高,蠕变应变越大;饱水蠕变过程,温度和有效应力是影响蠕变变形特性的主要因素,随温度的升高蠕变应变逐渐增大,但其增加幅度逐渐减小.在72 h的饱水蠕变过程中,渗透压为2 MPa时,30,60,90℃...
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| Published in | 煤炭学报 Vol. 45; no. 3; pp. 1070 - 1080 |
|---|---|
| Main Authors | , , , , , |
| Format | Journal Article |
| Language | Chinese |
| Published |
太原理工大学原位改性采矿教育部重点实验室,山西太原030024
01.03.2020
太原理工大学矿业工程学院,山西太原030024 |
| Subjects | |
| Online Access | Get full text |
| ISSN | 0253-9993 |
| DOI | 10.13225/j.cnki.jccs.2019.0238 |
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| Abstract | TD315; 为了研究温度-溶浸-应力耦合作用下钙芒硝盐岩蠕变的温度效应,利用自主研发的三轴岩石力学试验机,进行了围压4 MPa、轴压5 MPa、不同温度(30,60,90℃)、不同渗透压(3,2,1 MPa)条件下的三轴蠕变试验,并在试验前后对试件进行CT扫描,分析了不同蠕变过程中温度对钙芒硝蠕变变形的影响.结果 表明:溶浸连通过程,对钙芒硝盐岩蠕变变形起主要作用的是渗透压和温度,渗透压越小且温度越高,蠕变应变越大;饱水蠕变过程,温度和有效应力是影响蠕变变形特性的主要因素,随温度的升高蠕变应变逐渐增大,但其增加幅度逐渐减小.在72 h的饱水蠕变过程中,渗透压为2 MPa时,30,60,90℃条件下的蠕变应变分别为0.009 5×10-2,0.014 4× 10-2,0.019 5×10-2,渗透压为3 MPa时,分别为0.001×10-2,0.003×10-2,0.007×10-2;排水蠕变过程,影响钙芒硝蠕变变形的主要因素是温度-溶浸-应力作用的历史过程对钙芒硝固体骨架力学性能的弱化程度和温度对蠕变过程的热损伤作用,随温度的升高蠕变应变和其增加幅度都逐渐增大;基于非线性流变力学理论,对广义开尔文模型进行改进,根据蠕变试验结果,采用曲线拟合法对改进后模型的参数进行反演识别,结果与实测数据吻合效果良好,说明改进后的模型可以较好的描述钙芒硝在温度-溶浸-应力耦合作用下的排水蠕变过程. |
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| AbstractList | TD315; 为了研究温度-溶浸-应力耦合作用下钙芒硝盐岩蠕变的温度效应,利用自主研发的三轴岩石力学试验机,进行了围压4 MPa、轴压5 MPa、不同温度(30,60,90℃)、不同渗透压(3,2,1 MPa)条件下的三轴蠕变试验,并在试验前后对试件进行CT扫描,分析了不同蠕变过程中温度对钙芒硝蠕变变形的影响.结果 表明:溶浸连通过程,对钙芒硝盐岩蠕变变形起主要作用的是渗透压和温度,渗透压越小且温度越高,蠕变应变越大;饱水蠕变过程,温度和有效应力是影响蠕变变形特性的主要因素,随温度的升高蠕变应变逐渐增大,但其增加幅度逐渐减小.在72 h的饱水蠕变过程中,渗透压为2 MPa时,30,60,90℃条件下的蠕变应变分别为0.009 5×10-2,0.014 4× 10-2,0.019 5×10-2,渗透压为3 MPa时,分别为0.001×10-2,0.003×10-2,0.007×10-2;排水蠕变过程,影响钙芒硝蠕变变形的主要因素是温度-溶浸-应力作用的历史过程对钙芒硝固体骨架力学性能的弱化程度和温度对蠕变过程的热损伤作用,随温度的升高蠕变应变和其增加幅度都逐渐增大;基于非线性流变力学理论,对广义开尔文模型进行改进,根据蠕变试验结果,采用曲线拟合法对改进后模型的参数进行反演识别,结果与实测数据吻合效果良好,说明改进后的模型可以较好的描述钙芒硝在温度-溶浸-应力耦合作用下的排水蠕变过程. |
| Author | 杨晓琴 梁卫国 曹孟涛 肖宁 杨玉良 李静 |
| AuthorAffiliation | 太原理工大学矿业工程学院,山西太原030024;太原理工大学原位改性采矿教育部重点实验室,山西太原030024 |
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| Author_FL | YANG Xiaoqin XIAO Ning LI Jing YANG Yuliang LIANG Weiguo CAO Mengtao |
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| Keywords | 钙芒硝盐岩 温度效应 蠕变 溶浸作用 |
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| Snippet | TD315; 为了研究温度-溶浸-应力耦合作用下钙芒硝盐岩蠕变的温度效应,利用自主研发的三轴岩石力学试验机,进行了围压4 MPa、轴压5 MPa、不同温度(30,60,90℃)、不同渗透压(3,2,1... |
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| Title | 钙芒硝盐岩多场耦合作用下蠕变的温度效应研究 |
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