北山花岗岩三轴压缩条件下声发射特性研究  

Study on Acoustic Emission Characteristics of Beishan Granite Under Triaxial Compression Conditions

作　　者：宗自华[1] 马利科[1] 高敏[1] 田霄[1] 

机构地区：[1]核工业北京地质研究院,中核集团高放废物地质处置评价技术重点实验室,北京100029

出　　处：《铀矿地质》2013年第2期123-128,共6页Uranium Geology

摘　　要：对高放废物地质处置库甘肃北山预选区新场岩体深部花岗岩进行三轴压缩破坏过程声发射监测,研究在不同围压条件下花岗岩的强度特性和破坏机理,探究其在变形破坏过程中的声发射参数变化规律,得出岩石破裂各个阶段的声发射规律及其应力水平,获得裂隙初始应力、裂隙损伤应力和峰值应力的强度包络线,为进一步建立工程岩体的强度准则创造前提条件,为工程稳定性数值模拟分析提供必要的力学参数与计算模型。Beishan granite is the candidate host rock of China＇s high-level radioactive waste repository. Compression tests with different confining stresses in combination with acoustic emission （AE） moni-toring technique are used to study the strength and failure mechanism of granite in the depth of Xinchang pluton of Beishan area, Gansu province. The variation characteristics of the acoustic emission parametersduring rock failure were investigated. The characteristic stress thresholds associated with crack initiation, crack damage and peak strength envelops at different fracturing stages of rocks were obtained. Thepresented study has provided preconditions and mechanical parameters for establishing the failure criterion and further stability analysis of underground engineering.

关 键 词：北山花岗岩 强度 声发射 

分 类 号：TU42[建筑科学—岩土工程] TL942[建筑科学—土工工程]