三轴压缩岩石动静组合强度及变形特征的研究

›› 2009, Vol. 30 ›› Issue (7): 1981-1986.

三轴压缩岩石动静组合强度及变形特征的研究

叶洲元，李夕兵，周子龙，尹土兵，刘希灵

中南大学资源与安全工程学院，长沙 410083

收稿日期:2007-12-12 出版日期:2009-07-10 发布日期:2011-03-10
作者简介:叶洲元，男，1977年生，博士研究生，主要从事采矿工程、岩石力学研究方面的工作。
基金资助:
国家自然科学基金资助项目（No. 10472134）；国家自然科学基金重大项目（No. 50490270，No. 50674107）。

Static-dynamic coupling strength and deformation characteristics of rock under triaxial compression

YE Zhou-yuan, LI Xi-bing, ZGOU Zhi-long, YIN Tu-bing, LIU Xi-ling

School of Resources and Safety Engineering, Central South University, Changsha 410083, China

Received:2007-12-12 Online:2009-07-10 Published:2011-03-10

摘要/Abstract

摘要：

为研究深部地下资源开发过程中矿岩的力学行为，利用自行研制的岩石动静组合加载试验机，对细砂岩进行了两个系列的三维动静组合加载试验，即固定围压改变轴向静压和固定轴向静压改变围压的试验，并对实验数据整理分析。试验结果表明：围压不变时，细砂岩动静组合强度、弹性模量随轴向静压增大先升高（弹性阶段）后降低（损伤阶段）；最大应变率和平均应变率则先下降后升高，并且当轴向静压在其静态三轴抗压强度80 %左右时，动静组合强度最大；轴向静压不变时，增大围压，细砂岩动静组合强度、弹性模量升高，平均应变率下降，而最大应变率的变化趋势无明显规律。

关键词: 动静组合加载, 三轴压缩, SHPB

Abstract:

By means of the improved SHPB with axial pre-pressure and confined pressure, a series of experiments on sandstone are carried out to research the mechanical behaviors of rock during the course of exploitation of resources in deep. The experiment includes some tests under triaxial static-dynamic coupling loads with fixed confined pressure or fixed axial static pressure. The results from tests under fixed confined pressure show that both static-dynamic coupling strength and elastic modulus are increased at the elastic stage and decreased at failure stage with increasing axial static pressure. The maximal strain rate and average strain rate are decreased at the elastic stage and increased at failure stage. When the axial static stress reaches to 80% of the corresponding static triaxial compressive strength, the static-dynamic coupling strength will be up to the maximum. On the condition of fixed axial static pressure, the static-dynamic coupling strength and elastic modulus are increased and the average strain rate is decreased with increasing confined pressure. It is found that the maximal strain rate is not obvious related with the confined pressure.

Key words: static-dynamic coupling load, triaxial compression, SHPB

中图分类号:

TU 455

叶洲元，李夕兵，周子龙，尹土兵，刘希灵. 三轴压缩岩石动静组合强度及变形特征的研究[J]. , 2009, 30(7): 1981-1986.

YE Zhou-yuan, LI Xi-bing, ZGOU Zhi-long, YIN Tu-bing, LIU Xi-ling. Static-dynamic coupling strength and deformation characteristics of rock under triaxial compression[J]. , 2009, 30(7): 1981-1986.

参考文献

相关文章 15

[1]	高峰, 曹善鹏, 熊信, 周科平, 朱龙胤, . 冻融循环作用下受荷青砂岩的脆性演化特征[J]. 岩土力学, 2020, 41(2): 445-452.
[2]	周翠英, 梁宁, 刘镇, . 红层软岩压缩破坏的分形特征与级联失效过程[J]. 岩土力学, 2019, 40(S1): 21-31.
[3]	赵国彦, 李振阳, 吴浩, 王恩杰, 刘雷磊. 含非贯通裂隙砂岩的动力破坏特性研究[J]. 岩土力学, 2019, 40(S1): 73-81.
[4]	李晓照, 戚承志, 邵珠山, 屈小磊, . 基于细观力学脆性岩石剪切特性演化模型研究[J]. 岩土力学, 2019, 40(4): 1358-1367.
[5]	孟庆山, 范超, 曾卫星, 余克服, . 南沙群岛珊瑚礁灰岩的动态力学性能试验[J]. 岩土力学, 2019, 40(1): 183-190.
[6]	彭守建, 王哲, 许江, 大久保诚介, 汤杨, . 三轴压缩条件下饱水岩石破坏后区荷载速率效应试验研究[J]. 岩土力学, 2018, 39(S2): 72-82.
[7]	崔德山, 陈琼, 项伟, 王菁莪, . 黄土坡滑坡饱和滑带土三轴压缩应力松弛试验研究[J]. 岩土力学, 2018, 39(S2): 209-216.
[8]	马旭强，施锡林，尹洪武，杨春和，李银平，马洪岭，. 三轴压缩下含夹层盐岩破坏机制[J]. , 2018, 39(2): 644-650.
[9]	马芹永，高常辉，. 冲击荷载下玄武岩纤维水泥土吸能及分形特征[J]. , 2018, 39(11): 3921-3928.
[10]	张晋勋，杨昊，单仁亮，隋顺猛，薛东朝，. 冻结饱水砂卵石三轴压缩强度试验研究[J]. , 2018, 39(11): 3993-4000.
[11]	王建国，杨阳，郭延辉，刘洋，黄永辉，王立娜,. 高应变率下饱水花岗岩动力学特性的低温效应[J]. , 2017, 38(S2): 163-169.
[12]	杜海民，马巍，张淑娟，周志伟. 围压与含水率对冻结砂土破坏应变能密度影响特性研究[J]. , 2017, 38(7): 1943-1950.
[13]	詹金武，李涛. 破碎泥岩注浆结石体动力特性的SHPB试验及其数值模拟研究[J]. , 2017, 38(7): 2096-2102.
[14]	刘新荣，王子娟，傅晏，张梁，袁文，缪露莉, . 考虑干湿循环作用泥质砂岩的强度与破坏准则研究[J]. , 2017, 38(12): 3395-3401.
[15]	郝铁生，耿毅德，陈跃都，. 含脆硬夹层盐岩力学特性试验研究[J]. , 2017, 38(11): 3119-3126.

Metrics

Viewed

Full text

Abstract

Cited

Shared

Discussed