Deformation control technology of roadway surrounding rock with active advance supporting of grouting anchor cable
In view of the loose and broken geological conditions of mining roadway at No.1404 working face of Xintian Coal Mine,the active advance supporting roadway with grouting anchor cable was adopted to control the deformation of surrounding rock.FLAC3D soft-ware was used to simulate the advance timbering and roadway surrounding rock deformation during coal mining,and the change of ad-vance timbering and roadway surrounding rock deformation characteristics under different advancing distances were analyzed.According to the geological conditions of the No.1404 working face,the active advance supporting parameters and the ratio of grouting materials were designed,and the engineering monitoring and verification were carried out.The results showed that during the process of advancing the working face,the influence range of the advance timbering was about 20 m,and the peak value of the advance timbering was reached within 4-5 m.With the increase of the distance from the same working face,the deformation of the roadway decreased significantly,and the overall change trend showed a negative exponential function.Engineering monitoring showed that the deformation of roadway sur-rounding rock tended to be stable after 20 days,in which the deformation of two sides was about 80-110 mm,and the subsidence of roof was about 160-200 mm.The supporting facilities were in effective working condition,the active advance supporting technology of grouting anchor cable can control the deformation of roadway surrounding rock.
万方数据
维普
