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充填开采是建筑物下压煤的开采方法之一。为研究超高水充填开采对建筑物的采动影响程度,评价超高水充填效果,以吕沟煤矿超高水充填工作面为例,建立地表移动观测站对地表沉陷进行观测。采用概率积分法预计地表移动和变形值等,分析超高水充填开采对建筑物的影响。研究表明:超高水充填后地表下沉值较小,工作面推进270 m时,地表最大下沉值为43 mm;地表村庄建筑物损害级别在Ⅰ级以内。超高水充填开采能大幅减小地表移动和变形值,降低建筑物损害等级,保障地表建筑物的安全使用。
Filling and mining is one of the methods of mining coal under buildings. In order to study the impact of ultrahigh water filling on the mining of buildings and evaluate the effect of ultrahigh water filling, a case study is conducted to investigate the surface subsidence caused by the super high water filling face in Lvigou Mine. Probabilistic integral method is used to predict the movement of the earth’s surface and the deformation value. The impact of ultra-high water filling and mining on buildings is analyzed. The results show that the surface subsidence is very small after super high water filling, and the maximum surface subsidence value is 43 mm when the working face is advanced by 270 m. The damage level of surface village buildings is within grade Ⅰ. Ultra-high water filling mining can significantly reduce the surface movement and deformation values, reduce building damage levels, to ensure the safe use of surface buildings.