Background: Coal mining requires safe and effective roadway support to ensure production worker safety. Anchor is a common method used for controlling the roof of coal seams. This study aims analyze effectiveness different anchor schemes provide theoretical basis designing support. Methods: The authors computer simulation tool called FLAC3D simulate spacing between bolts, bolt length, cable con...

Excavating tunnels in sandy cobble strata carries a high risk of ground collapse caused by instability the tunnel face. In order to prevent at face during excavation, this paper focuses on studying effects various pre-reinforcement method stability sand-cobble strata. Firstly, projects suitable for these are proposed. Then, using FLAC3D established numerical models, then simulate excavation pro...

As the hydropower development strategies of China continue to be implemented, a host large projects have been completed or are being constructed in southwest China. During construction Jinchuan station, this study examined stability surrounding rock during excavation and unloading hydraulic tunnels under demanding geological conditions. Microseismic (MS) monitoring technology was employed monit...

In this research, the variation of ultimate bearing capacity, failure mechanism and deformation pattern of soil beneath two closely square footings have been studied using numerical methods. It is assumed that the adjacent footings are constructed on the surface of sand. The presented numerical analyses are based on explicit-finite-difference code, FLAC3D. The elasto-plastic behavior of soil is...

The roadway stability has been regarded as the main challenging issue for safety and productivity of deep underground coal mines, particularly where roadways are affected by mining activities. This study investigates −740 m in Jining No. 2 Coal Mine to provide a theoretical basis control disturbances adjacent working Field surveys, analyses, numerical simulations used reveal mechanisms disturba...

Abstract In order to consider the influence of soil moisture content change on slope stability Hejin Cherry Valley Garden Project, this paper firstly selects samples at typical locations obtain shear strength test results loess under different content; Then, based rhinoceros and FLAC3D software, reduction method is used analyze stability, impact water comprehensively evaluated according safety ...

The damage evolution rules for coal under true triaxial combined static–dynamic loads are important to understand and reveal the mechanism of rockburst in mines. numerical simulation was carried out using FLAC3D explore coupling effect static dynamic stress, especially influence load parameters. results show that increase amplitude not only makes plastic zone grow exponentially shortens develop...