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针对千树塔煤矿11301工作面回风顺槽上方地表外侧10 m存有35 k V铁塔情况,在工作面回采后引起地表弯曲下沉破坏,铁塔线路受到威胁。通过理论计算铁塔前后留设25 m、工作面一侧留设50 m顶煤时地表弯曲下沉各个参数值,数值模拟分析放落顶煤和不放落顶煤2种方案的地表点垂直位移和水平位移,并结合相关规程的要求,通过采取综合优化采放工艺和地表铁塔基础加固联合技术措施,综放工作面成功地通过了铁塔,达到了预期的目标。
In view of the situation of 35 kV tower located 10 m above the ground surface above the return air inlet of 11301 face of Chishuita Coal Mine, the surface bent sinking damage is caused after the mining face mining and the tower line is threatened. According to the theoretical calculation, the values of surface bending and sinking when leaving 25 m of the top of the tower and 50 m of top coal on the working face are calculated, and the vertical displacements of the ground surface by the two methods of falling top coal and falling top coal are numerically simulated And horizontal displacement, combined with the requirements of the relevant regulations, through the comprehensive optimization of mining technology and surface steel tower foundation consolidation joint technical measures, fully mechanized caving face successfully passed the tower, to achieve the desired goal.