Abstract:
The belt roadway in Longquan Coal Mine is seriously deformed by the influence of the return airway driving disturbance.It is particularly important for stable control of roadway surrounding rock deformation to explore the disturbance influencing rules between roadways and optimize the scheme of roadway support. The in-situ measurement, FLAC
3D numerical analysis and underground monitoring were used to study the influence of driving disturbance on the stability of surrounding rock, based on the numerical analysis and in-situ measurement results, the optimization scheme of roadway support was put forward. The results show that: under the influence of disturbance, the fracture and displacement of shallow surrounding rock increase; when the distance between roadways is 45 m, the roadway surrounding rock is basically unaffected by disturbance, while when the distance is 35 m, the disturbance has little influence; when the distance of roadway is 25 m, the roadway surrounding rock is obviously affected by disturbance, the approach of left and right sides is 52.4% and 22.0% higher than that of 45 m, and the left side is 24.5% higher than the right side, while when the distance is 15 m, the roadway is seriously damaged; when the distance between roadways increases from 25 m to 35 m, the plastic zone of surrounding rock can be reduced by 53.1%, but when the distance between roadways (25 m) is not suitable to change, the plastic zone of surrounding rock can also be reduced by 45.6% by optimizing the support parameters. The optimization scheme is proved to be economic and reasonable by engineering application, and meets the requirements of safety production.