Study on Roadway Stability under Mining Disturbance Based on FLAC3D
The stability of surrounding rock of roadways near the ore body is closely related to the mining disturbance.Taking the deep west orebody of Qinglonggou North Mining section and the return roadway of 3280 north wind shaft of Dachaid-an Mining as the main research objects,field geological investigation and indoor rock mechanics tests are carried out,and then the rock mass quality classification and rock mass mechanics parameter estimation are carried out.According to the mine pro-duction plan,the numerical simulation model is established to analyze the displacement law and the evolution process of mining stress.The results show that with the development of deep west orebody mining work,the roadway deformation is small on the whole,and it moves towards the stope direction.With the increase of mining depth,the stress concentration area of the right side and spandrel of the roadway rotates clockwise with the lower stress area of the roof,and the subsequent mining of orebodies has little influence on the stress distribution around the roadway after the mining of 5 middle sections.There is a phenomenon of stress concentration in the return air roadway of 3280 north wind shaft,the left slope and the connecting road between them.In view of the poor quality of phyllite rock mass,the quality of rock mass in this area should be comprehensively understood and the support design should be optimized.
万方数据
维普
