Numerical test study on spherical explosive waves propagating characteristics and dynamical cracks production in wall rock
Yang Zi-you1;GU Jin-cai2;Yang Ben-shui1;Li Yong-chi3
(1.School of Civil Engineering, Anhui university of Architecture, Hefei 230022 China;2.The Third Research Institute of the Corps of Engineering, General Staff of CPLA, Luoyang 471023,China;3. Department of Modern Mechanics,University of Science and Technology of China, Hefei 230026,China)
Abstract：By the nonlinear dynamic finite element program, spherical explosive waves propagating characteristics and process of dynamical cracks production are studied for semi-infinite rock and soil medium which contains an underground cavern. The differences of spherical explosive waves’ attenuation law and forms of dynamical cracks of unreinforced and reinforced zones by rock bolts underground cavern are compared respectively. The results indicate that the dynamical cracks of wall rocks are caused by synthetical actions which contain the tensile waves and their superposition reflected by free plane and the unreinforced and reinforced zones’ shear. The attenuation speed of spherical explosive waves of unreinforced underground cavern is faster than that of reinforced underground cavern. The reinforced underground cavern’s failure degree is lighter than that of unreinforced underground cavern. The forms of the dynamical cracks of numerical simulation are compared with the corresponding results of the model test. Some parts of the model tests data are compared with the results of numerical analysis.The forms and laws of the dynamical cracks of underground caverns are consistent between numerical analysis and model test. This shows the results of numerical simulation are credible. This numerical test results have good reference values for understanding of the spherical explosive waves and the reinforced design of protective engineering.
杨自友;顾金才;杨本水;李永池. 球面波传播特性和围岩动态裂纹产生的数值试验研究[J]. , 2010, 29(5): 110-113.
Yang Zi-you;GU Jin-cai;Yang Ben-shui;Li Yong-chi. Numerical test study on spherical explosive waves propagating characteristics and dynamical cracks production in wall rock. , 2010, 29(5): 110-113.
2010, Vol. 29 
