Characteristics of Stress Changes in Surrounding Rock of Complex Roadway Group and Stress Transfer Laws of Roadway Group
In response to the complex phenomenon of stress distribution of the surrounding rock in the complex roadway group of Xiadian Coal Mine,a numerical model of the complex roadway group of Xiadian Coal Mine is constructed using the"Rhino-Griddle-Flac3D"joint method to reveal the stress transfer mechanism of the complex roadway group.The research finds that when the working face advances to a distance of 40 m,30 m,20 m,10 m,0 m,and-10 m from the return air detour of the 3120 return air roadway,stress transfer causes stress concentration occurs in the intersection area formed by the two sides of the 3120 return air roadway,the 3120 high extraction roadway,and the 3120 high extraction roadway return air channel.The maximum stress values are 19.25 MPa,20.22 MPa,19.36 MPa,20.19 MPa,19.00 MPa,and 21.50 MPa,respectively.The advanced area and intersection location area of the stoping working face are prone to happen stress concentration situation,and this position is greatly affected by stress transfer.Therefore,it is necessary to strengthen the key control of the above areas to ensure the overall stability of the surrounding rock of the roadway group.
stress transfer mechanismcomplex roadway groupnumerical simulationstress concentration
国家科技期刊平台
NSTL
万方数据
