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《Coal Science and Technology》 2017-09
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Analysis on representation of stress field structure of roadway surrounding rock and its failure factor

JIN Hongwei;XIAO Qiao;LI Shugang;XU Gang;Institute of Safety Science and Engineering,Xi'an University of Science and Technology;The State Key Laboratory of Coal Resources and Mine safety,China University of Mining and Technology;  
The stress field structure in roadway surrounding rock has an important influence on the deformation and failure of roadway. In order to represent the stress field structure in roadway surrounding rock,a method was put forward which useing principal stress trajectories to visualize stress field. Consequently,the stress field structure was represented by the position and types of the degenerate points in the principal stress trajectories diagram and the distribution of dominant principal stress trajectories bundle. Numerical simulation was carried out for different lateral pressure coefficient and strata combination of roadway,and the principal stress trajectories were drawn by hand according to the simulation results. The varying pattern of the stress field structure was summarized,and the relationship between stress field structure and rock failure characteristics was also derived. The results showed that stress trajectories were an effective method to represent the stress field structure of roadway surrounding rock,there was an explicit relationship between the failure of roadway surrounding rock and the structure of stress field. These research findings provided a new approach for the establishment of roadway surrounding rock control theory.
【Fund】: 国家自然科学基金资助项目(51404190 51404189);; 中国矿业大学煤炭资源与安全开采国家重点实验室开放研究基金资助项目(13KF07);; 中国博士后科学基金资助项目(2015M572655XB)
【CateGory Index】: TD322
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