摘要
以赵庄煤矿3号煤层的3304工作面为研究对象,运用UDEC模拟方法,对采动覆岩移动变形破坏情况及采空区的孔隙率的分布进行研究。结果表明:岩层的下沉形态类似于"簸箕"状分布,得到了采空区孔隙率分布的定量计算表达式及孔隙率分布情况,随着高度的增加,冒落破碎岩体的孔隙率逐渐减小。
Taking 3304 working face of Zhaozhuang Coal Mine No.3 coal bed as the research object, using UDEC simulation method, damage movement and deformation of overlying strata and the distribution of mined out area porosity is studied. The results show that the strata subsidence form is similar to ＂dustpan＂shape distribution. The quantitative expression of porosity distribution and the distribution of porosity are obtained. With the increase of height, the porosity of the falling rock mass decreases gradually.
出处
《煤矿安全》
北大核心
2017年第11期210-212,共3页
Safety in Coal Mines
关键词
采空区
覆岩移动
下沉量
孔隙率
数值模拟
瓦斯抽采
goaf
overlying strata movement
subsidence
porosity
numerical simulation
gas drainage
