骨架式膏体充填采空区试验研究

Experimental research on goaf filling with skeleton type backfill paste

结合观台矿的钻孔资料,对村庄下压煤进行了研究。采用相似材料模拟试验,对普通膏体充填与骨架式膏体充填的减沉效果进行对比,得出骨架式充填的减沉效果好于普通膏体充填。又通过计算机数值模拟,对全部垮落法、普通膏体充填和骨架式膏体充填处理采空区后引起的地表变形进行预测,得出对采空区进行充填能大幅度减少地表沉陷,采用骨架式膏体充填可以实现村庄下压煤开采后不破坏地表建筑物的目的。

Combined with the borehole data of Ouantai Coal Mine, the coal pressed under the villages was studied. By using similar material simulation technology, to compare the reducing effect between the paste filling and the skeleton type paste filling, it is concluded that the sank effect by the skeleton type filling is smaller than that of the ordinary paste filling. Through the computer numerical simulation, by using all the pieces fell method, the ordinary paste filling and the skeleton type paste filling, the surface deformation caused by mined-out area was predicted, it is concluded that the surface subsidence can be significantly reduced by filling. By using the skeleton type paste filling, it can realize the purpose of not destroying of surface buildings after the coal mining pressed under the villages.