The Ground Stress Effect On Roadway Surrounding Rockstability And The Control Technology Research Of The Roadway In Gucheng Coal Mine

After the tunnel is excavated underground engineering, surrounding rock stress will be redistribute, the redistribution of rock stress related to the size of ground stress and direction.This paper analyzes the ground stress and surrounding rock of the measured rock mechanical parameters. Summed up:(1)The GuCheng mine of ground stress type is vσ type,The ground stress of horizontal stress has 20 Angle.The ground stress belongs to moderate stress type and the maximum horizontal stress is much bigger than smaller horizontal stress,this is easy to cause shear failure.(2)The GuCheng mine of N1303 roadway of roof surrounding rock is Mudstone, sandstone and Floor is mudstone, the GuCheng mine of surrounding rock lithology is weak.By analyzing the dipangle of the maximum horizontal stress and the angle of it with the axis of the roadway impact on the roadway surrounding rock stress and displacement, Summed up: With the α angle increase, Roadway of working slop diameter direction of stress decreases but decrease is slowly no significant, the roadway of shoulders and rood hoop stress increase. With the α angle increase, the roadway of the shoulder and working slope of radial displacement is increasing, but the shoulder of displacement is increase faster than the working slope of displacement, the roadway of roof of radial displacement is reduced with the α angle increase. When the dip angle is changed between 0 ° ~ 45 °, with the ? angle increase, the roadway of working slope and shoulders of hoop stresses are reduced, the roadway of working slope and shoulders of axial stress is increase, the roadway of working slope and shoulders of radial displacement is decreases, the roadway of working slope and shoulders of axial displacement is increases. It analyzes the impact of the inclination angle, friction angle,cohesion and ground stress on the plastic zone. Analysis the influence of roadway surrounding rock about the α angle and dip angle by numerical simulation, when α angle follow 45 °, the roadway surrounding rock stability is better,.Finally, combining the above analysis design the GuCheng mine of N1303 Belt Roadway.