Coal Engineering ›› 2024, Vol. 56 ›› Issue (4): 98-103.doi: 10. 11799/ ce202404015

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Deviation correction technique for TV signal tower above thick coal seam mining area

  

  • Received:2022-08-23 Revised:2023-07-14 Online:2023-04-20 Published:2024-12-09

Abstract:

In order to solve the problems of the deformation and the instability of the tower body caused by the surface movement and deformation above the coal thickness change area, which affect the normal and safe operation of the television signal tower and reduce the coal resource recovery rate. We studied the dynamic protection and foundation reinforcement technology for the radio and television signal tower above 13031 coalface of Baiping Coal Company. Based on the calculation and analysis of ground movement and tower deformation and on-site monitoring, we applied the precision grouting reinforcement technology and the dynamic leveling protection technology for the television tower protection. In order to improve the strength of the foundation and compensate the subsidence of the foundation, we drilled holes in the television foundation for penetration grouting reinforcement. We transformed the fixed tower foundation into a height adjustable foundation. When the tilt of the tower foundation is close to 5mm/m, the height of the four towers can be controlled through the tower height adjustment system in time to reduce the tilt deformation of the tower. These results suggest that the tilt of the tower has security risk and the inclination of the base is greater than 4mm/m twice while the 13031 working face is in the range of -200m~+180m from the center of the TV signal tower. On the basis of grouting reinforcement, the tower was levelled twice with dynamic levelling device. The tower tilt deformation value was less than the upper limit during the mining surface deformation activity period. the radio and TV signal tower was in good operation condition.

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