深井岩巷变形特征数值模拟研究

Study on Numerical Simulation of deformation characteristics of deep rock roadway

为解决深井岩巷变形问题,以云南某铅锌矿山深井岩巷为研究对象,采用FLAC3D构建深井岩巷数值模型,模拟结果表明:顶板沉降、底板底鼓,拉应力出现在巷道起拱处及底板中部,压应力集中出现在顶底板中部;塑性区程圆形分布,以剪切破坏为主。为矿山工程施工安全及支护提供了理论依据。

In order to solve the deformation problem of roadway in deep, the roadway of a lead-zinc mine in Yunnan was taken as the research object. The numerical model of roadway in deep was constructed by FLAC3D. The simulation results showed that the phenomenon of roof settlement and bottom plate drum could occur;the tensile stress appeared in the arch of the roadway and the middle of the bottom plate, also the compressive stress was both concentrated in the middle of the plate in the top and the bottom;the plastic region was presented circular distribution, and the damage form was mostly in shear. The deformation provided a theoretical basis of safety and support in mine construction.