浅埋煤层综放开采过特殊区域采放管理应用技术分析

Analysis on Management Application of Fully-mechanized Caving Mining Through Specific Area with Shallow Bury

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。

Focused on a 35 k V tower located at the surface 10 m out there above the return shaft of11301 working face in trees tower mine, discussed the situation that tower line would be threatened after the flexural subsidence of the surface caused by the mined working face. Through theoretical calculations of the individual parameters of curved surface subsidence when retaining 25 m top coal before and after the tower or retaining 50 m top on one side of the working face,the numerical simulation is used to analyse the vertical displacement and horizontal displacement of caving and uncaving top coal programs,and combined with the requirements of the relevant regulations, through the comprehensive optimization of mining and caving technology and the measures of dividing the tower foundation into reinforced united part, the fully mechanized caving face pass through the tower successfully,reaching the expected objectives.