The potential of sudden water accidents induced by damage to the bottom slab that forms a channel due action karst calls for research on law coal seam floors under coupling effect mining and water. In this study, situation floor rock was analyzed based theory mechanics fracture mechanics, combined with actual geological conditions floor. water-rock investigated using theoretical analysis mechan...

In the practical processes of coal mines and tunnel, rectangular roadways are widely used in underground environment. However, stress distribution law rock mass around is relatively complicated that influenced by different parameters, such as situ stress, geological structure, properties surrounding mass. It extremely significant to conduct systematic in-depth research regarding deformation fai...

The accurate prediction and evaluation of stress displacement fields surrounding rock is the fundamental premise for deformation control soft tunnels under high geo-stress condition. However, due to complicated mechanical characteristics with confining pressure influence, current numerical simulation method usually regards parameters as constant ignores variation these in process, which leads r...

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...