煤柱宽度对地表移动变形影响数值模拟研究

Numerical simulation study of the influence of coal pillar on the surface movement and deformation

文中采用离散元数值模拟软件UDEC研究工作面间煤柱宽度对地表移动变形的影响。以山西某矿的地质采矿条件为工程背景,建立了7种不同工作面煤柱宽度工况条件下的数值模拟方案;分析了各工况开采后岩层竖向应力及地表移动变形的规律。随着工作面间煤柱宽度的增加,地表移动变形值大幅度的减小。因此,适当增加工作面煤柱宽度可作为控制地表移动变形及保护建筑物一种途径。

In the paper, discrete element numerical simulation software UDEC is used to study on the influence of coalpillar among panels on the surface movement and deformation. Taking the geological and mining conditions of a coalmine in Shanxi as the engineering background, the author establishes seven numerical simulations under differentconditions of coal pillar, and analyzes vertical strain and surface movement and deformation rules under the condi-tions of post - mining. With the increasing width of coal pillars among panels, surface movement deformation value isgreatly reduced. Therefore, appropriate increasing coal pillar width among panels can be used as a way to controlsurface movement and deformation and protect buildings.