نتایج جستجو برای: jointed rock medium

تعداد نتایج: 275255  

Journal: :Symmetry 2021

Stress arching effect during the excavation of broken surrounding rock in underground engineering has an important influence on stability after excavation. To determine stress horizontally layered jointed mass, characteristics mass is analyzed this study by using a series numerical tests. The formation mechanism arch revealed through comparison voussoir beam structure and theoretical analysis m...

Journal: :Applied sciences 2022

The original DDARF (discontinuous deformation analysis for rock failure) can only generate uniform grids, and the increase in number of grids reduces efficiency calculation, which limits use large-scale geotechnical engineering. This is a problem that needs to be solved DDARF. A new method proposed this paper optimize generation DDARF, optimized heterogeneous grids. model Brazilian disc-splitti...

2007
Todd A. Gaines W. Brien Henry Patrick F. Byrne Philip Westra Scott J. Nissen Dale L. Shaner

Gene flow between jointed goatgrass and winter wheat is a concern because transfer of herbicide-resistance genes from imidazolinone-resistant (IR) winter wheat cultivars to jointed goatgrass could restrict weed-management options for this serious weed of winter wheat cropping systems. The objectives of this study were (1) to investigate the frequency of interspecific hybridization between IR wh...

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