At present,non-pillar entry protection in longwall mining is mainly achieved through either the gob-side entry retaining......

To investigate the water-inrush process due to floor heave, simulation model was made and factors of mining height, imme......

On the basis of analyzing floor strata mechanical circumstance of the roadway, the mechanical model was established. The......

On basis of ground stress surveying and analysis of physical nature and mechanics character of rock, the deformation mec......

Roadway surrounding rock is a compound structure consisted of roof, floor and sides. The sides of extraction opening is ......