条带开采保留煤柱宽度和采出宽度与地表变形的关系

应用条带开采进行建筑物下压煤开采,除保证留设煤柱要有足够的强度和稳定性,开采宽度不超过上覆岩层所形成稳定结构(托板、平衡拱、梁等)极限宽度外,条带开采还应保证地表不出现波浪型下沉盆地。以概率密度函数法为基础,从开采沉陷的角度分析了条带开采煤柱宽度、采出宽度和地表变形的关系,得出了条带开采煤柱宽度和采出宽度的最佳匹配计算方法,对条带开采地表移动和变形控制具有一定的借鉴意义。图6,参10。

The relationship of the coal pillar width and the mining width with the surface deformation caused by strip extraction

Mining under buildings by using of strip extraction, the left coal pillars must be strong enough to keep stable under the over strata loading, the mining width must be less than the limited width of structure formed in the over strata. Planning strip extraction under buildings, it must be noted that a waved surface subsidence basin could not be occurred. Based on the probability density function method, the relationship of the coal pillar width and the mining width with the surface deformation has been analyzed. How to determine the left coal pillar width and the mining width has been presented. It is helpful for using the strip extraction method to control the surface movement and deformation. 6figs. ,10refs.