| 基于应变水平的砂岩脆性破坏声发射信息研究 |
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| 引用本文： | 孙强,薛雷,钱海涛,朱术云. 基于应变水平的砂岩脆性破坏声发射信息研究[J]. 采矿与安全工程学报, 2012, 0(3): 407-410 |
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| 作者姓名： | 孙强 薛雷 钱海涛 朱术云 |
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| 作者单位： | 中国矿业大学资源与地球科学学院,深部岩土力学与地下工程国家重点实验室;中国科学院地质与地球物理研究所工程地质力学重点实验室;中国地震局地壳应力研究所 |
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| 基金项目： | 中国科学院工程地质力学重点实验室开放基金项目(KLEG201106);国家自然科学基金项目(41102201);中央高校基本科研业务费专项资金项目(2010QNA54);江苏高校优势学科建设工程项目 |
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| 摘 要： | 岩石脆性破坏过程中的声发射信息与其受载变形破坏过程密切相关,在岩石破裂前的膨胀点、应力峰值点和应力-应变曲线峰值后拐点位置存在声发射会出现突增现象。利用岩石破坏的三维重整化群理论给出了岩石破裂前声膨胀点所对应的应变和岩石峰值应力对应的应变水平比值的表达式,单轴荷载条件下其临界比约为74%与78%之间,并通过砂岩刚性加载试验得到了验证;同时通过对试验数据的分析发现,岩石破裂前的膨胀点、应力峰值点和应力-应变曲线峰值后拐点位置所对应的应变值之间具有很好的比值关系。
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| 关 键 词： | 声发射 重整化群 应力应变曲线 砂岩 |
Study on AE Variation of Sandstone Brittle Failure Based on Strain Level |
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| SUN Qiang,XUE Lei,QIAN Hai-tao,ZHU Shu-yun. Study on AE Variation of Sandstone Brittle Failure Based on Strain Level[J]. Journal of Mining and Safety Engineering, 2012, 0(3): 407-410 |
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| Authors: | SUN Qiang XUE Lei QIAN Hai-tao ZHU Shu-yun |
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| Affiliation: | 1(1.School of Resources and Earth Science,State Key Laboratory for GeoMechanics and Deep Underground Engineering,China University of Mining & Technology,Xuzhou,Jiangsu 221116,China;2.Key Laboratory of Engineering Geomechanics,Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029, China;3 Institute of Crustal Dynamics,China Earthquake Administration,Beijing 100085,China) |
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| Abstract: | AE information of rock brittle failure is closely related to the deformation failure process under loading,and AE will increase suddenly in the stages of expansion point before rock rupture,stress peak point,and inflection point after the peak value,respectively.In this paper,based on three-dimensional renormalization group theory,the ratio expression between the strain related to the expansion point before rock rupture and the one related to the stress peak point is obtained,and the critical ratio has a range of 74% to78% under the uniaxial loading,which has been proved by the rigid loading test of sandstone.Meanwhile,according to the analysis of test data,the strain value between the expansion point before rock rupture,stress peak point,and inflection point after peak value is nearly stable. |
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| Keywords: | AE renormalization group stress-strain curve sandstone |
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