花岗岩岩爆微观断裂与声发射分析对比研究  

Comparison Study of Microscopic Fracture and Acoustic Emission Analysis of Granite Rock Burst

作　　者：王创业[1] 杜晓娅[1] 

机构地区：[1]内蒙古科技大学矿业研究院,内蒙古包头014010

出　　处：《煤炭技术》2017年第6期21-24,共4页Coal Technology

摘　　要：采用双向加载系统可模拟不同水平应力下圆形硐室卸荷岩爆的发生。根据实验后岩屑样品的电子显微镜照片,及岩爆过程中的声发射参数,分析其破坏过程的微观断口裂纹。结果表明:随着水平应力的增加,岩石拉破裂随着水平应力增加而减小,剪破裂随着水平应力的增加而增加。将卸荷岩爆的微观断裂现象与岩爆过程中声发射参数的裂纹分析相对比发现,结果基本一致。The occurrence of unloading rock burst in circular chamber under different horizontal stress conditions is simulated by using the granite under the natural state. According to the electron microscopic photographs of the cuttings and the acoustic emission parameters during the rockburst, the microscopic fracture of the fracture was analyzed. The results show that with the increase of the horizontal stress, the rock rupture decreases with the increase of the horizontal stress, and the shear fracture increases with the horizontal stress. The microscopic fracture phenomena of unloading rockburst are compared with the crack analysis of acoustic emission parameters during rockburst, and the results are basically the same.

关 键 词：圆形硐室 卸荷 岩爆 微观 声发射 

分 类 号：TD235.3[矿业工程—矿井建设]