Study on the Deformation and Fracture of Bolted Roadway with Infrared Characteristics
The thermal infrared (TIR) radiation in the deformation and progressive failure of coal roadway and the mechanism of thermo-mechanical coupling were investigated.The experimental achievement showed that the surface TIR temperature (TIRT) rose non-uniformly with the load increase before the stress peak and TIR radiation caused by stress concentration,shear band and bolted area,was much stronger and higher than that caused by stress relaxation,week friction and tensile fracturing.The bolted ranges were determined from the change ratios of TIR temperature of the different areas of the bolted surrounding rocks.The infrared thermal image anomaly appeared with the macro-cracks development in the progressive failure of bolted roadways,which reflected the spatial and temporal features of infrared precursor respectively.The infrared thermal image precursors were classified as TIRT increment region and TIRT constant region to disclosure the damage evolution and localization behaviors of bolted roadways.
Infrared radiation Surrounding rock Thermo-mechanical coupling Stress concentration Stress relaxation Infrared precursor
Ruling Yan Yongjun Zhang Liqian An Lingtao Mao
School of Mechanics and Civil Engineering, China University of Mining and Technology, Beijing,100083 School of Civil Engineering, Qingdao Technological University, Qingdao 266033, China;State Key Labor School of Mechanics and Civil Engineering, China University of Mining and Technology, Beijing,100083
国际会议
杭州
英文
317-321
2012-03-23（万方平台首次上网日期，不代表论文的发表时间）