不同应力条件下断裂带结构发育特征探讨 .pdfVIP

学兔兔 第25卷7期 中 国 煤 炭 地 质 Vo1．25 No．07 2013年 7月 CoAL GE0L0GY OF CHINA Ju1． 2013 doi：10．39696．issn．1674—1803．2013．07．02 文章编号：1674—1803(2O13)07一o0O5—03 不同应力条件下断裂带结构发育特征探讨 李 月 (山东科技大学地质科学与工程学院，山东青岛 266590) 摘 要：脆性断层断裂带内部结构主要包括破碎带和诱导裂缝带两部分。断层性质、断层活动性、埋深、断层两盘(主 动盘、被动盘)、岩石力学性质、距离断层远近、断层组合规律等都可以成为影响断裂带内部结构发育的因素。通过 讨论不同的应力条件下断裂带内部结构的发育特征，认为正断层形成的破碎带范围较小，裂隙形态不规则，诱导裂 缝带中发育张裂隙和剪裂隙；由逆断层作用形成的破碎带范围较大，诱导裂缝带主要是由张裂隙和剪裂隙组成。由 平移断层作用形成的破碎带延伸较稳定。 关键词：应力；断裂带；破碎带；诱导裂缝 中图分类号：P542 文献标识码：A Discussion on Faulted Zone Structural Development Characteristics under Diverse Stresses Li Yue (College of Geosciences and Engineering，Shandong University of Science and Technology，Qingdao，Shandong 266590) Abstract：The internal structure of brittle faulted zone mainly includes fracture zone and induced fissure zone two parts．Factors of fault character，mobility，buried depth，two walls(active and passive)，rock mechanical property，distance to fault and combination pattern etc． can all impact faulted zone internal structural development．The paper has mainly discussed faulted zone internal structural develop— ment characteristics under diverse stresses．The study has figured out that fracture zone formed by normal faults has smaller extent with irregular fracture modality；tension and shear fissures have developed in induced fissure zone．Fracture zone formed by reversed faults has larger extent．Induced fissure zone is mainly composed of tension and shear fissures．While fracture zone formed by strike—slip faults has rather stable extension． Keywords：stress；faulted zone；fracture zone；induced fissure 断层在我国东部陆相断陷盆地中具有特别重要