厚硬顶板沿空留巷围岩结构稳定性数值模拟研究

Numerical Simulation Study on Structural Stability of Surrounding Rock in Gob-side Entry Retaining with Thick and Hard Roof

本文采用数值模拟研究的方法对厚硬顶板条件下沿空留巷围岩结构稳定性进行了分析,采用UDEC建立了相应的数值分析模型,模拟了留巷墙体及煤帮变形特征、巷内顶板及底板变形特征、留巷采场侧向顶板垮冒特征,在此基础上分析了围岩应力变化特点。

In this paper,the structural stability of surrounding rock along the caved roadway under the condition of thick hard roof was analyzed by numerical simulation,the corresponding numerical analysis model was established by using UDEC to simulate the deformation characteristics of the retaining roadway wall and coal side,the deformation characteristics of the roof and floor in the roadway,and the collapse characteristics of the lateral roof in the stope in the retaining roadway,on this basis,the variation characteristics of surrounding rock stress were analyzed.