Simulation Study On Temperature Effect And Anchoring Mechanism Of Rock Burst In Deep Tunnel

With the rapid development of China’s economy,in the field of transportation,mineral resources mining,water conservancy and other fields,deep underground engineering excavation more and more frequent.Due to the special engineering environment of the "three high and one disturbance" of the underground engineering and the underground engineering,the shallow underground engineering excavation theory is used to guide the excavation of deep underground engineering.For deep excavation,the shallow surrounding rock is no longer suitable.Under the influence of the deep special engineering excavation environment,the high-frequency rockburst,the surrounding rock burst,the surrounding rock irregularity Rupture and other super-conventional response;and for these super-conventional response mechanism and the impact of factors for the analysis of deep underground engineering excavation has a very important significance.In this paper,combined with the relevant literatures of excavation of deep underground engineering,the mechanics characteristics of deep underground engineering and the super-conventional response of deep engineering are summarized.The mechanism of rockburst and bursting phenomenon in deep engineering is summarized.The similarities and differences between the two mechanisms.Based on the previous research results on the rupture of zoning,the fracturing of the deep surrounding rock is classified from the point of view of the rupture zone distribution of the zoning,which is divided into two types: typical zoning and atypical irregular rupture.The Secondly,this paper will combine the previous numerical simulation of irregular rupture,based on the basic characteristics of the deep rock mass in the post-peak strain softening state,and establish the numerical model.According to the research results of temperature thermal stress in the related literature,the initial stress in the numerical model is decomposed into temperature influence part and other tectonic stress and stress part.According to the temperature,the thermal stress part is corrected accordingly In the form of a function embedded in the numerical model for numerical simulation.On the basis of this,the effects of temperature,thermal conductivity,linear expansion coefficient and specific heat capacity on the irregular rupture of surrounding rock are simulated.Based on the numerical simulation results,the maximum shear stress curve and the plastic zone boundary Relationship.In the end,this paper will strengthen the verification experiment based on the parameters of the anchorage zone of the rock mass,and confirm that the mechanical parameters of the anchorage zone of the anchorage zone are strengthened.Combining with the experimental results and the empirical formula of the previous study on the variation of the anchorage zone parameters,The anchorage area of the surrounding rock is modeled on the basis of the empirical formula.On this basis,the influence of the anchor anchorage on the irregular rupture of the deep rock is simulated and analyzed.The influence of the three factors on the irregular rupture of the surrounding rock is analyzed.