柱面波在含节理岩体中传播的UDEC模拟

doi:10.13722/j.cnki.jrme.2018.1264

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Abstract The cylindrical wave is one of the common wave types in rock mass blasting engineering and the cylindrical wave propagation is a great concern of rock mass excavation and underground structure safety. This paper presents a numerical study on cylindrical P-wave propagation across a jointed rock mass using UDEC. Firstly，a semicircular cylindrical cavity is established at the bottom of the model to simulate the cylindrical wave loading. Then，studies on cylindrical wave propagation across a rock mass without joint and with a single joint are conducted respectively. By compared with the theoretical results，UDEC is proved to be efficient to simulate cylindrical wave propagation across jointed rock mass. After that，parametric studies are carried out to investigate the influence of joint stiffness，the frequency of incident wave and the position of monitoring point on the transmission and reflection coefficients. The results show that the position of the monitoring point affects the transmission and reflection coefficients by influencing the geometric attenuation of the wave and changing the incident angle of the incident wave. Joint stiffness has a significant influence on the reflection coefficient within a certain range. The analysis of frequency effect verifies the characteristics of joint to filter high frequency waves. Finally，the character of cylindrical wave propagation across a set of joints is investigated. The results show that the transmission effect of the wave is corporately influenced by the joint spacing and the number of joints.

Key words： rock mechanics cylindrical wave jointed rock mass wave propagation numerical simulation transmission and reflection coefficients

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	CHAI Shaobo
	ZHAO Junhai
	WANG Hao

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CHAI Shaobo,ZHAO Junhai,WANG Hao. UDEC simulation on cylindrical wave propagation through jointed rock masses[J]. , 2019, 38(S1): 2848-2856.

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http://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2018.1264 OR http://rockmech.whrsm.ac.cn/EN/Y2019/V38/IS1/2848

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