Abstract:
In response to the difficulty of maintaining the three soft coal seams in the Yiluo Coal Mine,the author analyzes the mining and excavation situation,the mechanical properties of the surrounding rock,mine pressure behavior characteristics,support parameters and time effect. It is considered that the rheological failure of weak surrounding rock and the unreasonable support parameters are the reasons for the disrepair of surrounding rock. The rationality of the proposed maintenance scheme was validated by numerical simulation methods. On-site industrial tests showed that the integrated anchor-injection supporting technology of three soft coal roadway surrounding rock can effectively control the deformation of the surrounding rock,and the amount of the deformations is small,ensuring the stability of the surrounding rock.