基于FLAC3D多节理模型的顶底板采动变形破坏特征研究

Study on Deformation and Failure Characteristics of Roof and Floor Mining Based on FLAC3D Model Ubiquitous

摘要: 在对深部煤层进行开采时，采煤工作面顶底板的地层沉积结构会对顶底板的强度产生影响，当顶底板层理面发育时，更易发生破坏变形，进而引发工作面顶底板的垮落底鼓事故，严重威胁矿井工作人员的生命安全以及破坏工作面开采设备。本文通过FLAC3D数值模拟的多节理和库仑摩尔本构模型对比分析工作面底板在层理发育时的破坏变形情况，得出：层理构造发育区域，采煤工作面顶底板的结构强度较层理不发育地区要低。导致顶底板更容易发生破坏变形。在层理构造发育地区开采煤资源时，应注意加强对顶底板的水害防治与采空区的支护。

Abstract: In the deep coal seam mining, the mining face of roof and floor strata sedimentary structure affect the strength of the roof and floor, roof and floor when bedding plane development, are more likely to happen damage deformation, causing working face roof and floor of floor heave of caving accidents, serious threat to the mine staff safety of life and destruction of mining equipment of working face. In this paper, Model ubiquitous and Model mohr of FLAC3D numerical simulation are used to compare and analyze the failure and deformation of the working face floor during the bedding development, and the following results are obtained: The structural strength of the roof and floor of the coal mining face is lower than that of the area where the bedding structure is developed. The top and bottom plates are more prone to failure and deformation. When exploiting coal resources in the area with bedding structure development, attention should be paid to strengthening the prevention of water damage to roof and floor and the support of goaf.