建筑物下粉煤灰膏体充填采煤控制地表沉陷效果预测与分析  

Prediction and Analysis on Surface Subsidence Control Effect with Fly Ash Paste Filling in Coal Mining under Buildings

作　　者：何荣军[1] 张天模[1] 骆大勇[1] 

机构地区：[1]重庆工程职业技术学院,重庆402260

出　　处：《矿业安全与环保》2017年第5期68-71,75,共5页Mining Safety & Environmental Protection

摘　　要：粉煤灰膏体充填采煤是目前最为有效的建筑物下采煤技术,也是绿色采矿的重要组成部分。以某矿区建筑物下采煤为例,通过对粉煤灰膏体充填采煤控制地表沉陷的数值模拟预测,采用分层全部充填开采3个分层,累计最大下沉量为125 mm,最大倾斜变形量为0.39 mm/m,最大曲率变形量为0.003×10^(-3)m^(-1),最大水平移动量为56 mm,最大水平变形量为0.3 mm/m,倾斜变形量、水平变形量、曲率变形量均处于Ⅰ级破坏变形允许的范围内。预测结果表明,所提出的建筑物下粉煤灰膏体充填采煤在技术上是可行的,可为建筑物下煤矿开采提供技术依据。The coal mining with fly ash paste filling is the most effective mining technology under buildings and also an important part of the green mining at present. In this paper, numerical simulation and prediction were carried out on the surface subsidence control in coal mining with the fly ash paste filling by taking the coal mining under buildings in a certain mining area as an example, 3 layers were all mined by slicing and filling, with the maximum vumulative subsidence amount of 125 mm, the maximum inclination deformation amount of 0. 39 mm/m,the maximum curvature deformation of 0. 003 x 10-3 m-1 , the maximum horizontal displacement of 56 mm and the maximum horizontal deformation of 0. 3 mm/m,the inclination deformation, horizontal deformation and curvature deformation were all within the allowable range of grade I damage deformation. The prediction results showed that the coal mining technology under buildings with fly ash paste filling was technically feasible and can provide the technical basis for the coal mining under buildings.

关 键 词：建筑物下 充填开采 粉煤灰膏体 地表沉陷 预测 

分 类 号：TD325[矿业工程—矿井建设]