Research on the Spatial Evolution Law of Deformation of Surrounding Rock in Tunnels
In order to ensure the safety of underground mining and improve the stability of tunnels,numerical simulation software was used to study the spatiotemporal changes of tunnel surrounding rock displacement.It was found that after mining to a certain distance,the displacement of the roof and floor of the tunnel surrounding rock can be divided into three stages:stable stage,increasing stage,and reverse increasing stage.At the same time,the sinking curve of the roof shows an"S"shape.In the initial stage,the sinking speed gradually increases,and then in the active stage,the sinking speed increases rapidly.In the decline stage,the sinking speed first increases and then decreases,and then gradually tends to a stable state.Finally,the vertical displacement of the roadway under different mining speeds was analyzed,and it was found that the faster the mining speed,the smaller the deformation of the roadway roof,which is more beneficial for maintaining the stability of the roadway.
numerical simulationsurrounding rock deformationmining speedvertical displacement
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