基于FLAC 3D数值模拟下深部软弱煤岩围岩应力场与位移场分析

Stress Field and Displacement Field Analysis of Coal Rocks Based on FLAC 3D Numerical Simulation

煤矿的开采改变了原岩地应力场与位移场,使得围岩应力重新分布,应力密集区的高应力会造成煤炭开采巷道的变形破坏,围岩应力场与位移场的分布规律研究对煤矿的安全开采至关重要.通过对数值模拟的5个模型的分析,对建立的围岩应力场与位移场的分布规律进行了研究,为煤矿的安全开采提供理论依据.依据矩形巷道的理论研究,得到其位移场与应力场的基本分布状态,然后对深部软弱煤岩应力场与位移场的分布进行分析,确定煤岩应力场与位移场分布的影响因素.

Coal mining can change the original stress field and displacement field of the rocks, which leads to the stress redistribution and high stress in the stress-concentrated areas can cause deformation of coal mining tunnels. Therefore it is critical to study the distribution law of stress field and displacement field for the safety of the coal mining. According to the theoretical research of the rectangular tunnel, the distribution laws and the tunnel failure mechanism are obtained through the reasonable numerical simulation models, and the factors are identified.