为研究具有层理结构岩石的岩爆倾向性,以西鞍山铁矿地区的层理千枚岩为研究对象,现场取样并加工为标准试样,使用刚性压力机进行单轴加卸载压缩试验。对试验结果进行分析,揭示了西鞍山铁矿地区千枚岩的破坏特征,在室内岩石力学试验的基础上,结合线弹性能判据(PES )及弹性能量指数(WET )对不同层理角度下的岩石岩爆倾向性定量分析。结果表明：千枚岩强度在加载方向与层理夹角为0°、90°时最高,30°、45°时较低,60°最低,总体呈现出 U 型变化规律；千枚岩的弹性模量随夹角的增大逐渐增大：PES、WET指标均显示,千枚岩的岩爆倾向性呈0°最大,90°次之,60°最小的类 U型变化趋势。研究结果为在层理岩石内开拓巷道、确定巷道走向及进行巷道支护等方面提供了有益参考。%To get the rockburst characteristics of layered rock during the loading and unloading process,phyllite in Xianshan iron mine was taken out and made into standard rock samples,uniaxial compression tests were carried out by using rock mechanical experimental rig.The experiment results indicate the failure characteristic and strength of anisotropic of the layered rock.Then,based on the results of laboratory tests in rock mechanics and field investigation,the rockburst tendency of rock samples with different layered angles are determined according to the potential energy of elastic strain (PES)and linear elastic energy criterion (WET ).The results show that phyllite exhibit maximum uniaxial compressive strength (UCS)at 0°or at 90°,and minimum UCS at 60°.The elastic modulus of phyllite increases gradually when the layered angle increases from 0°to 90°.The rockburst tendency of phyllite was highest at 0°,lowest at 60°which was identified with PES and WET.The results of the research in rockburst tendency of phyllite provide a useful reference to tunnel excavation.
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