Abstract In current research, a novel geometrical technique is introduced to estimate the length ( L ) of sliding arc by considering slip surface entry point distance d e ). Morgenstern-Price limiting equilibrium and strength reduction methods are selected within framework SLOPE/W FLAC 3D softwares respectively, study mechanism stability-effecting factor for loose rock slope comprise two differ...

The purpose of this paper is to report the first stage of the implementation within FLAC of a hydromechanical model using an iterative procedure between two independent hydraulic and mechanical sub-models. The fracture network of the rock mass is considered using the multilaminated medium concept. The implemented model is illustrated through its application to the hydraulic circuit of the Venda...

Abstract In this study, the effect of nailing angle on pull-out capacity nails in soil slopes was investigated using finite difference method with help FLAC 3D software. Initially, geometric model created at three different angles excavation slope (45°, 63°, and 80°). Considering Mohr–Coulomb behavioral applying physical parameters order to nail system, five rows angles, relative horizon, which...

Directional long drilling on the roof is an effective gas control measure in goaf, but there little research stability of surrounding rock. In this study, geological conditions #4 coal seam Tingnan Coal Mine, Shaanxi Province, China taken as application background, and deformation characteristics boreholes under four typical rock were first analyzed based Universal Distinct Element Code (UDEC) ...

Complex flagellar filaments are unusual in their fine structure composed of flagellin dimers, in their right-handed helicity, and in their rigidity, which prevents a switch of handedness. The complex filaments of Rhizobium lupini H13-3 and those of Sinorhizobium meliloti are composed of three and four flagellin (Fla) subunits, respectively. The Fla-encoding genes, named flaA through flaD, are s...

Goaf restoration is an important part of urban space management. With mining coal resources, appearance goaf and subsidence areas causes serious geological disasters environmental ecological problems, which significantly affect safety, development, construction. Therefore, repair goafs crucial. In this study, the Jingmen Garden Expo Park was taken as example. Through acquisition engineering con...

Gas extraction in the pressure-relief area using depressurization effect of seam mining is an effective way to solve coal-mine gas problems. In this paper, we performed numerical modelling 204 working face via FLAC 3D, by which stress variation rock mass and associated permeability evolution during advancement were investigated. Furthermore, favorable zone for pressure relief was proposed based...