蠕变扰动效应下红砂岩强度极限邻域试验研究

TD315; 为得到更合适的强度极限邻域及其划分依据,以红砂岩为研究对象,应用自主研发的RRTS-IV型岩石蠕变扰动效应试验系统及动态测试分析系统,通过岩石蠕变及其扰动效应下单轴压缩试验,结合理论分析,开展红砂岩强度极限邻域及其划分依据相关研究.依据试验结果,首先从分级加载蠕变曲线和应力应变等时曲线2个方面分析了横向蠕变和轴向蠕变所确定长期强度的差异性;然后从瞬时扰动变形量和残余扰动变形量转化规律2个方面对岩石横向蠕变和轴向蠕变所确定的强度极限邻域进行了对比研究;最后通过综合分析得到合适的强度极限邻域及其划分依据.研究结果表明:相对于瞬时扰动变形量,以残余扰动变形量转化规律确定强度极限邻域更合...

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Published in煤炭科学技术 Vol. 49; no. 9; pp. 54 - 60
Main Authors 王波, 刘重阳, 陈学习, 陆长亮, 黄子康, 胡仕宇
Format Journal Article
LanguageChinese
Published 华北科技学院 安全工程学院,河北 廊坊 101601 05.08.2021
Subjects
强度极限邻域;蠕变扰动效应;横向蠕变;轴向蠕变;长期强度
Online AccessGet full text
ISSN0253-2336
DOI10.13199/j.cnki.cst.2021.09.008

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Abstract TD315; 为得到更合适的强度极限邻域及其划分依据,以红砂岩为研究对象,应用自主研发的RRTS-IV型岩石蠕变扰动效应试验系统及动态测试分析系统,通过岩石蠕变及其扰动效应下单轴压缩试验,结合理论分析,开展红砂岩强度极限邻域及其划分依据相关研究.依据试验结果,首先从分级加载蠕变曲线和应力应变等时曲线2个方面分析了横向蠕变和轴向蠕变所确定长期强度的差异性;然后从瞬时扰动变形量和残余扰动变形量转化规律2个方面对岩石横向蠕变和轴向蠕变所确定的强度极限邻域进行了对比研究;最后通过综合分析得到合适的强度极限邻域及其划分依据.研究结果表明:相对于瞬时扰动变形量,以残余扰动变形量转化规律确定强度极限邻域更合适;相对于轴向蠕变残余扰动变形量转化规律,以横向蠕变残余扰动变形量转化规律确定强度极限邻域更合适,由此得出红砂岩的强度极限邻域阈值约为32.5 MPa;长期强度确定的强度极限邻域阈值与残余扰动变形量转化规律确定的强度极限邻域阈值相差约2.5 MPa,但作为简单的初步分析判定,以长期强度界定强度极限邻域仍有较高的参考价值.
AbstractList TD315; 为得到更合适的强度极限邻域及其划分依据,以红砂岩为研究对象,应用自主研发的RRTS-IV型岩石蠕变扰动效应试验系统及动态测试分析系统,通过岩石蠕变及其扰动效应下单轴压缩试验,结合理论分析,开展红砂岩强度极限邻域及其划分依据相关研究.依据试验结果,首先从分级加载蠕变曲线和应力应变等时曲线2个方面分析了横向蠕变和轴向蠕变所确定长期强度的差异性;然后从瞬时扰动变形量和残余扰动变形量转化规律2个方面对岩石横向蠕变和轴向蠕变所确定的强度极限邻域进行了对比研究;最后通过综合分析得到合适的强度极限邻域及其划分依据.研究结果表明:相对于瞬时扰动变形量,以残余扰动变形量转化规律确定强度极限邻域更合适;相对于轴向蠕变残余扰动变形量转化规律,以横向蠕变残余扰动变形量转化规律确定强度极限邻域更合适,由此得出红砂岩的强度极限邻域阈值约为32.5 MPa;长期强度确定的强度极限邻域阈值与残余扰动变形量转化规律确定的强度极限邻域阈值相差约2.5 MPa,但作为简单的初步分析判定,以长期强度界定强度极限邻域仍有较高的参考价值.
Author 刘重阳
王波
陆长亮
黄子康
陈学习
胡仕宇
AuthorAffiliation 华北科技学院 安全工程学院,河北 廊坊 101601
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HU Shiyu
LIU Chongyang
WANG Bo
CHEN Xuexi
HUANG Zikang
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Snippet TD315; 为得到更合适的强度极限邻域及其划分依据,以红砂岩为研究对象,应用自主研发的RRTS-IV型岩石蠕变扰动效应试验系统及动态测试分析系统,通过岩石蠕变及其扰动效应下单...
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Title 蠕变扰动效应下红砂岩强度极限邻域试验研究
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