急倾斜煤层开采顶板岩层“两带”发育形态研究

Research on Roof Strata "Two Zone" Development Form in Steeply-inclined Coal Seam Mining

在理论分析急倾斜煤层开采过程中覆岩破坏形态特征的基础上,以新集三矿1100307工作面开采为背景,运用FLAC3D软件模拟煤矿开采引起的煤层顶板覆岩运移过程,并结合该工作面电法探测结果,确定"两带"发育特征。"两带"发育总体上呈似倒"厂"型形态,覆岩破坏的范围主要位于在采空区的上山方向的底端,直接顶岩层被剪断或顺层滑落,采空区被充填形成"砌体拱"结构。

On the basis of theoretical analysis of overburden failure form characteristics in the process of steeply-inclined coal seam mining,it took 1100307 working face mining of Xinji No. 3 Coal Mine as the backgroud. Combined with electrical detection results of the working face,it determined the development characteristics of ＂ two zone＂ by using FLAC3D sofeware to simulate the movement process of roof strata caused by coal mining. The ＂ two zone＂ development was like inverted ＂ 厂＂ shape in general. The scope of the overburden failure mainly located in the bottom of uphill direction of the goaf. The direct roof strata was snipped or slided,the goaf was filled and formed ＂ masonry arch＂ structure.