[1]许延春,李昆奇,谢小锋,等.裂隙岩体损伤的注浆加固效果试验[J].西安科技大学学报,2017,(01):26-31.[doi:10.13800/j.cnki.xakjdxxb.2017.0105]
 XU Yan-chun,LI Kun-qi,XIE Xiao-feng,et al.Grouting reinforcement of fracturedrock mass based on damage mechanics[J].Journal of Xi'an University of Science and Technology,2017,(01):26-31.[doi:10.13800/j.cnki.xakjdxxb.2017.0105]
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裂隙岩体损伤的注浆加固效果试验(/HTML)
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西安科技大学学报[ISSN:1672-9315/CN:61-1434/N]

卷:
期数:
2017年01期
页码:
26-31
栏目:
出版日期:
2017-01-30

文章信息/Info

Title:
Grouting reinforcement of fracturedrock mass based on damage mechanics
文章编号:
1672-9315(2017)01-0026-06
作者:
许延春12李昆奇12谢小锋12刘世奇12吕 斌12
1.中国矿业大学(北京)资源与安全工程学院,北京 100083; 2.国家煤矿水害防治工程技术研究中心(北京),北京 100083
Author(s):
XU Yan-chun12LI Kun-qi12XIE Xiao-feng12LIU Shi-qi12LV Bin12
1 .School of Resource and Safety Engineering,China University of Mining and Technology(Beijing),Beijing 100083 ,China; 2 .Engineering Technology Research Center of National Mine Water Disaster Prevention and Controlling(Beijing),Beijing 100083 ,China
关键词:
裂隙岩体 损伤变量 动弹性模量 定量评价
Keywords:
Key words:fractured rock mass damage variable dynamic elastic modulus quantitative evaluation
分类号:
TU 455
DOI:
10.13800/j.cnki.xakjdxxb.2017.0105
文献标志码:
A
摘要:
为了研究岩体的裂隙损伤及注浆加固恢复效应,基于损伤力学理论,引入损伤变量,构建综合岩体损伤和超声波测速定量评价裂隙岩体注浆加固效果的方法。通过室内试验模拟岩体裂隙损伤及注浆加固过程,应用超声波检测技术测定岩体在不同裂隙宽度下的声波传播速度,进而推算岩体动弹性模量,并对比分析注浆前后裂隙岩体的损伤变量与动弹性模量的变化程度及规律。结果表明:注浆前后岩体损伤变量均与裂隙宽度成正相关; 同一裂隙宽度下,泥岩的损伤变量最大,为0.89; 灰岩最小,为0.57; 注浆后,裂隙岩体损伤变量明显减小,且岩体动弹性模量明显增大,其中砂岩动弹性模量增加幅度最大,为354.82%; 泥岩次之,为174.15%; 灰岩最小,为85.75%.根据实验室结果对比分析,提出注浆加固变量,建立分级分岩性定量评价注浆效果的新方法,并应用于现场实践。
Abstract:
Abstract:In order to study crack damage and reparation effect of grouting in jointed rock mass,based on damage mechanics as well as introducing damage variable,composite rock mass damage and ultrasonic velocity measurement were built to quantify the reparation effect of grouting in jointed rock mass.The grouting reinforcement process and crack damage of fractured rock mass were simulated through laboratory experiment.Dynamic elastic modulus was reversely calculated through the application of ultrasonic testing technology,which could measure the acoustic wave propagation velocity in different crack width.Therefore,the changing rules between dynamic elastic modulus and damage variable were analyzed before and after grouting.The result shows that there is a positive correlation between mass damage variable and crack width before and after grouting.For the same crack width,the damage variable of mudstone is maximum,while limestone is minimum( 0 . 89 and 0 . 57 ,respectively).After grouting,the damage variables decrease and dynamic elastic modulus increase obviously.The increment of dynamic elastic modulus of sandstone is the largest,reaching 354 . 82 %,followed by mudstone( 174 . 15 %)and limestone( 85 . 75 %).According to the laboratory results,with the research of reinforcement variable,a new method of lithology grade assessment was built to quantify the grouting effects, which could be successfully applied to the field practice afterwards.

参考文献/References:

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备注/Memo

备注/Memo:
基金项目:国家自然科学基金(51504095) 通讯作者:许延春(1963-),男,河北唐山人,教授,博士生导师,E-mail:yanchun-xu@163.com
更新日期/Last Update: 1900-01-01