论文部分内容阅读
深井高地应力围岩控制是深井支护的难点,应用FLAC3D软件对深井半圆拱巷道在高地应力作用下围岩的弱化规律进行研究,发现深井高地应力围岩塑性区出现不连续分布的现象,随着时间的推移,塑性区逐渐增大,表明深井围岩属于非线性力学系统.同时,分析了不同侧压系数下的巷道围岩应力和位移,得到了在巷道纵向上和横向上两者的变化情况,以及不同地应力对深井锚喷网加锚索协同支护效果的影响.提出深井高地应力围岩高强度、高刚度以及大范围的围岩控制技术,并对不同地应力情况下的支护效果进行监测,取得了较好的支护效果.
The control of surrounding rock in deep highland stress rock is the difficult point of deep well support. The weakening regularity of surrounding rock of semi-circular archway under deep ground stress is studied by FLAC3D software. It is found that the plastic zone of discontinuous distribution of surrounding rock in deep highland stress field appears discontinuously. With the passage of time, the plastic zone gradually increases, indicating that the deep surrounding rock belongs to the nonlinear mechanical system. At the same time, the stress and displacement of the surrounding rock under different lateral pressure coefficients are analyzed. And the effect of different ground stresses on the synergistic supporting effect of the deep well anchor and shotcrete net plus the anchor cable.The high strength and high rigidity of the surrounding rock of the deep well and the surrounding rock are put forward in this paper. Support effect monitoring, and achieved good support effect.