To explore the bolt-grouting method of deep roadway under three-dimensional unequal ground stress, a unidirectional coupling model surrounding rock plastic failure and grouting diffusion considering influence excavation disturbance stress was established. Spatial evolution characteristics diffusion, impact spacing row bolts/cables on grout were simulated by using numerical method. The results r...

In view of the deformation and instability law hard roof without side filling retaining roadway, based on systematic construction analysis force bearing model roadway structure, this article proposes control mechanical calculation method retaining, which takes anchor beam key block above to form cantilever together, with solid coal as foundation support. The research practice show that under co...

In order to study the influencing factors of floor deformation and heave mechanisms deep mining roadways, this paper takes dynamic pressure roadway a mine as engineering background adopts research method combining theoretical analyses, numerical simulations field observations influence various on mechanisms. It is determined that are large buried depth, long duration pressure, unique characteri...

Large energy mining-induced tremors are generally caused by the rupture of thick-hard overlying strata, and roadway is prone to rockburst danger under its dynamic load. Through numerical simulations, laws influencing factors stress, deformation, fracture (red bed breaking) were revealed, results verified field observations. The main conclusions obtained: (1) tensile stress compressive concentra...