井下煤层开采引起的地表形变分析

Analysis of influence of underground caused by coal seam mining on surface deformation

煤炭是我国重要的能源之一,在我国经济发展中起着重要作用,井下煤层被开采以后,会破坏其周围岩层原有的力学平衡,导致地表发生沉降,有可能使矿山及地表发生危险。文章以矿区地表单点下沉动态规律为例,分析了井下煤层开采引起的地表形变规律,建立了动态数学预测模型,研究出Knothe时间函数模型并不能直接适于煤矿地表沉降数值建模,然后对该数学模型进行了改进,使其能够较好地模拟出煤矿地表沉降。

Coal is one of the important energy sources in China. It plays an important role in China's economic development. After the underground coal seam is mined, it will destroy the original mechanical balance of the surrounding rock layers, leading to settlement on the surface, which may cause danger to the mine and the surface. Taking the dynamic law of the sinking point of the mining area as an example, this paper analyzes the surface deformation law caused by coal seam mining in the underground, establishes a dynamic mathematical prediction model, and studies that the Knothe time function model is not directly suitable for numerical modeling of coal surface subsidence, and then the mathematical model has been improved to better simulate the surface subsidence of coal mines.