Correlation Analysis Between Geometric Characteristics of TBM Rock Slag and Rock Breaking Efficiency of Hobbing
In the construction of tunnel excavations using TBM,the rock-breaking efficiency of TBM will be affected by the surrounding rock condition and mechanical parameters.Therefore,the influence of different joint spacings,inclination angles and hob spacings on the efficiency of rock breaking is worthy of attention.Firstly,using an indoor roller cutter test,under the condition of fixing one of the parameters of rock mass joint inclination angle,spacing or roller cutter spacing,the variation law of the roughness index of rock slag generated by the change of the other two parameters is simulated,and the relationship between the shape of rock slag and the rock breaking efficiency and the characteristics of rock slag generated by TBM tunneling under different conditions are analyzed and summarized.Based on the water conveyance tunnel project of the Beijiang River in Guangzhou,the rock slag generated during the excavation of the tunnel was measured on site,and the screening test was completed.Then,the statistical data were analyzed to obtain the correlation between the wear law of the TBM cutterhead under different surrounding rock properties,rock slag roughness indices,and particle gradation coefficients.Finally,the roughness index,flatness and specific energy of rock slag are fitted,respectively,to further illustrate the influence of joint inclination angle and spacing on the rock breaking efficiency of the roller cutter.
NETL
NSTL
万方数据
维普
