Evolution Law and Control Technology of Stress and Plastic Zone of Surrounding Rock of Meeting Mining Roadway
When digging a roadway to meet the mining face,the roadway experiences the dynamic pressure influence from the fracture,slewing and sinking of the key block of the overlying rock layer on the neighbouring face,which results in large deformation of the roadway and difficulty in maintenance.Therefore,taking the excavation of 15105 mining face of Wenzhuang Coal Mine as the engineering background,numerical simulation method was adopted to reveal the evolution law of stress and plastic zone of the surrounding rock in the whole process of meeting mining.A roadway perimeter rock control system centred on"anchor cable reinforcing support in the mining impact zone of the working face in the upper section+hydraulic fracturing top-cutting and pressure relief technology"was proposed,and industrial experiments were carried out on site.Eventually,the on-site monitoring results showed that the overall control effect of the roadway in the mining section was good.
meeting mining and excavationcoal pillarsupport designstress evolution