Abstract:

Aiming to solve the support problems occurs in 51101 working face ends area of Shengxin coal mine, by means of fields investigation and engineering analogy, the surrounding rock failure feature and its influence factors were analyzed, and then the support parameters were determined. Furthermore, the displacement field changes with support was analyzed in comparison without support by using the FLAC3D. The analysis shows that the value of maximum roof subsidence, floor deformation and coal sides convergence decrease obviously and the support parameters are rational. Besides, fields practice demonstrates the surrounding rock deformation rate and amount in 51101 working face ends area are both in reasonable range, which not only achieves the goal of safe and efficiency mining, but provides some technical reference for the working face ends area support with the similar engineering geological conditions.