回风立井井筒围岩应力演化及变形规律的研究

Research on the Stress Evolution and Deformation Law of Air Shaft Surrounding Rock

针对贾郭煤矿新建回风立井,运用数值模拟研究不同垂直深度条件下回风立井井筒围岩地应力演化机制及变形规律,掌握了井筒围岩应力随深度不同变化的基本规律。井筒围岩塑性区范围,应力值及围岩变形随深度的增加而逐渐增大,但达到一定深度时,围岩应力增长率逐渐减小,并趋于稳定。

In view of the new-built air shaft of Jiaguo Coal Mine, researches the stress evolutionary mechanism and deformation law of air shaft surrounding rock with different vertical depths by useing the numerical simulation, and masters the basic law of the change of stress of wellbore rock in different variations depth. The area of plastic zone, stress and deformation of air shaft surrounding rock gradually increases with the increasing depth, g, but the growth rate of stress decreases gradually and stabilizes while reaching a certain depth.