为研究淮南矿区巨厚松散层大采深下采煤地表移动规律,对松散层厚400 m、采深500 m的某矿11118工作面地表沉陷实测数据进行了分析,得出了厚松散层大采深下采煤地表移动静态、动态规律和地表移动参数。结果表明:淮南矿区厚松散层大采深下采煤地表下沉曲线具有走向、倾向的双向对称特征;走向边界角、上、下山边界角很小且三者相等为35°;地表移动盆地边界收敛缓慢,出现长距离缓慢下沉带,建筑物受损轻微;采空区上方地表下沉集中且地表移动变形值大,建筑物损坏严重;同等开采条件下,厚松散层下单工作面采煤地表采动程度较一般开采条件下高,易接近或达到充分采动状态。

In order to study the surface movement law above the deep underground coal mining under ultra thick unconsolidated overburden in Huainan Mining Are a, an analysis was conducted on the measured data of the surface subsidence above the No.11118 coal mining face under a unconsolidated overburden strata with a thi ckness of 400 m and with a mining depth of 500 m.The surface movement statics, dynamics law and surface movement parameter above the deep underground coal mi ning with thick unconsolidated overburden were obtained.The results showed that the subsidence curve of the surface above the deep high mining with the thick uncons olidated overburden in Huainan Mining Area had the strike and inclination double directional symmetrical features and the strike boundary.The strike boundary angle, th e dip and rise boundary angles were small and the three angles were all 35° .The convergence of the surface movement boundary was slow, a long distance slow subsid ence zone was occurred and the buildings on the surface were failed slightly.The subsidence of the surface above the mining goaf was centralized, the movement defor mation value of the surface was high and the failure of the buildings was serious.Under the condition of the same mining, the miming degree of the surface above the si ngle coal mining face with thick unconsolidated overburden would be higher than the conventional mining condition and would be easy or reach full mining status.

“十一五”国家科技支撑计划资助项目(2007BAK28B03)；