Analysis on mining-induced stress evolution and surrounding rock failure mode of roadway during heading-mining period based on continuous measurement
SU Chao1，2，3，KANG Hongpu2，3，JIANG Pengfei2，3，LIU Chang2，3，LIU Yuedong2，3，YI Kang1
(1. College of Mining Technology，Taiyuan University of Technology，Taiyuan 030024，China；2. CCTEG Coal Mining Research Institute，Beijing 100013，China；3. State Key Laboratory of Intelligent Coal Mining and Strata Control，Beijing 100013，China)
Abstract：Mining-induced stress is one of the fundamental driving force of geological disasters in coal mining. In order to master the evolution law of mining-induced stress of surrounding rock during heading and mining period，in this study，hollow inclusion stress measurement technology was employed to obtain the full-cycle stress evolution data of the auxiliary roadway in the Caojiatan 122110 working face from the heading to the end of mining for the first time in China. The dynamic change law of the mining-induced stress in the surrounding rock under the influence of heading and mining was discussed，and the validity of the measured data was determined based on the M-C criterion，and the failure mode of the roadway surrounding rock was discussed using the stress ratio K. The research results show that the influence range of advance mining-induced stress during heading period and mining period was 8 m and 110 m，respectively，and the difference between maximum and minimum principal stress increases 0.17 times and 1.58 times，respectively. The increase value during mining period was 9.3 times of that during heading period. The failure mode of surrounding rock was mainly tensile failure of surface surrounding rock during period，and plastic failure occurred in a large range during mining period，in which the shallow surrounding rock is mainly tensile failure，the middle surrounding rock is tension-shear composite failure，and the deep area is generally less failure. The comprehensive field-measured data，drilling results，and in-situ failure characteristics indicate that the stress ratio K can better reflect the relationship between the stress state and the surrounding rock failure mode of the mining roadway.
苏 超1，2，3，康红普2，3，姜鹏飞2，3，刘 畅2，3，刘跃东2，3，伊 康1. 基于连续实测的煤巷围岩掘–采期间采动应力演化与破坏模式分析[J]. 岩石力学与工程学报, 0, (): 857-857.
SU Chao1，2，3，KANG Hongpu2，3，JIANG Pengfei2，3，LIU Chang2，3，LIU Yuedong2，3，YI Kang1. Analysis on mining-induced stress evolution and surrounding rock failure mode of roadway during heading-mining period based on continuous measurement. , 0, (): 857-857.
