Rockburst Generation in Discontinuous Rock Masses

doi:10.1007/s00603-015-0906-8

CORC > 武汉岩土力学研究所 > 中科院武汉岩土力学所 > 岩土力学所知识全产出 > 期刊论文

	Rockburst Generation in Discontinuous Rock Masses
	Hatzor, Yossef H.1; He, Ben-Guo 1; Zelig, Ravit 1; Feng, Xia-Ting2
刊名	ROCK MECHANICS AND ROCK ENGINEERING
	2016
卷号	49 期号:10 页码:4103-4124
关键词	Rockburst Deep underground excavations DDA Dynamic deformation Energy considerations
ISSN号	0723-2632
DOI	10.1007/s00603-015-0906-8
英文摘要	We study rockburst generation in discontinuous rock masses using theoretical and numerical approaches. We begin by developing an analytical solution for the energy change due to tunneling in a continuous rock mass using linear elasticity. We show that the affected zone where most of the increase in elastic strain energy takes place is restricted to an annulus that extends to a distance of three diameters from the tunnel center, regardless of initial tunnel diameter, magnitude of in situ stress, and in situ stress ratio. By considering local elastic strain concentrations, we further delineate the Rockbursting Prone Zone found to be concentrated in an annulus that extends to one diameter from the tunnel center, regardless of original stress ratio, magnitude, and the stiffness of the rock mass. We proceed by arguing that in initially discontinuous rock masses shear stress amplification due to tunneling will inevitably trigger block displacements along preexisting discontinuities much before shear failure of intact rock elements will ensue, because of the lower shear strength of discontinuities with respect to intact rock elements, provided of course that the blocks are removable. We employ the numerical discrete element DDA method to obtain, quantitatively, the kinetic energy, the elastic strain energy, and the dissipated energy in the affected zone in a discontinuous rock due to tunneling. We show that the kinetic energy of ejected blocks due to strain relaxation increases with increasing initial stress and with decreasing frictional resistance of preexisting discontinuities. Finally, we demonstrate how controlled strain energy release by means of top heading and bench excavation methodology can assist in mitigating rockburst hazards due to stain relaxation.
WOS研究方向	Engineering ; Geology
语种	英语
出版者	SPRINGER WIEN
WOS记录号	WOS:000385163800020
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/3939]
专题	岩土力学所知识全产出_期刊论文岩土力学所知识全产出国家重点实验室知识产出_期刊论文
作者单位	1.Ben Gurion Univ Negev, Dept Geol & Environm Sci; 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn
推荐引用方式 GB/T 7714	Hatzor, Yossef H.,He, Ben-Guo,Zelig, Ravit,et al. Rockburst Generation in Discontinuous Rock Masses[J]. ROCK MECHANICS AND ROCK ENGINEERING,2016,49(10):4103-4124.
APA	Hatzor, Yossef H.,He, Ben-Guo,Zelig, Ravit,&Feng, Xia-Ting.(2016).Rockburst Generation in Discontinuous Rock Masses.ROCK MECHANICS AND ROCK ENGINEERING,49(10),4103-4124.
MLA	Hatzor, Yossef H.,et al."Rockburst Generation in Discontinuous Rock Masses".ROCK MECHANICS AND ROCK ENGINEERING 49.10(2016):4103-4124.