2350煤矿河流改道后河堤变形分析

Analysis of the Deformation of the River Embankment After the River Diversion of 2350 coal mine

河流下开采煤层后势必对河道堤坝产生影响,为分析2350煤矿各煤层采出后河道堤坝的变形情况,采用工程类比法确定了留设煤柱时需要的岩移参数,河道按Ⅱ级保护,受护面积围护带宽度取15 m,河床宽度取30 m,用垂直剖面法确定不同煤层的煤柱宽度。借鉴相似条件矿区实测数据,初步确定概率积分法预计所需要的岩移预计参数,从预计结果得出,新河道位置的下沉值范围是2.2~2.4 m,水平变形值范围是5~8 mm/m。地表变形超标范围很大,对地表变形产生的影响非常严重,要保证安全开采必须进行河床维护。

coal mining is bound to the river after the river dam impact analysis of 2350 coal seam deformation after the river dam,the engineering analogy method to coal pillar when the rock movement parameters,the river as class II protection,protected area protected zone width is 15 m,the river width is 30 m sure,different coal pillar width by vertical section method. Based on the measured data of similar conditions in the mining area,we preliminarily determined the prediction parameters of rock movement needed by probability integral method. From the prediction results,we can get that the sinkage value of New River location is 2. 2 ~ 2. 4 m,and the range of horizontal deformation is 5 ~ 8 mm/m. The surface deformation exceeds the standard range,and the influence on the surface deformation is very serious. It is necessary to ensure the maintenance of the river bed for safe mining.