Deviation correction technique for TV signal tower above thick coal seam mining area
In order to solve the problems of the deformation and instability of the tower body caused by the surface movement and deformation above the thick coal seam mining area,which affect sthe safe operation of the TV signal tower and reduces the coal resource recovery rate,the dynamic protection and foundation reinforcement technology was studied for the signal tower above 13031 coalface of Baiping Coal Company.Based on the calculation and analysis of ground movement and tower deformation and the on-site monitoring,the precision grouting reinforcement technology and the dynamic leveling protection technology was applied for TV signal tower protection.In order to improve the strength of the foundation and compensate the subsidence of the foundation,the tower foundation was reinforced with drill-grouting.The fixed tower foundation was transformed into a adjustable foundation.When the tilt of the tower foundation is close to 5 mm/m,the height of tower foundation can be controlled through adjusting the foundation height in time to reduce the tilt deformation.According to the application results,the tilt of the tower surpassed 4mm/m twice while the 13031 working face was mined within the range of-200～+180 m from the center of the TV signal tower.Along with grouting reinforcement,the tower was leveled twice with dynamic leveling device.The tower tilt deformation value was less than the upper limit during the mining surface deformation activity period.The signal tower was kept in good operation condition.
signal towertowering structuresignal towerground movement and subsidencedynamic levelinginclinations
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