矿井开采对煤层顶底板影响研究

为了研究矿井开采对煤层顶底板的影响，采用理论分析的方法，分析了矿井开采对煤层顶板的影响、矿井开采对煤层底板的影响，首先研究了矿井开采对顶板影响范围、计算了首采层开采对上覆岩层的塌陷范围；然后，研究了矿井开采对底板破坏范围，以新田煤矿4号煤层工作面为例，研究得出:采空区对上覆岩层影响形成的塌陷盆地最大边缘为采空区外9.748 m；1401工作面回采对底板最大破坏深度71 m。研究为类似工程条件的开采对煤层顶底板影响范围提供理论依据。

Study on influence of mine mining on roof and floor of coal seam

In order to study the influence of mine exploitation on the coal seam roof and floor，the theoretical analysis method was used to analyze the influence of mine mining on the coal seam roof and the impact of mine mining on the coal seam floor.Firstly，the influence of mine mining on the roof was studied and the first mining layer was calculated.The extent of collapse of the overburden strata is mined；then，the extent of damage to the stratum of the mine is studied，taking the No.4 coal seam face of Xintian Coal Mine as an example，it is concluded that the maximum margin of subsidence basin formed by the influence of goaf on overlying strata is 9.748 m outside goaf，and the maximum damage depth of floor caused by mining in 1401 working face is 71 m.The study provides a theoretical basis for the influence of similar engineering conditions on the influence of coal seam roof and floor.