Discontinuous lining is a special form of support in underground excavation. Based on the method of plastic limit analysis, it is found the upper and the lower
It always adopts the direct hierarchy analysis to value the exploitation conditions of surface mining areas. This way has some unavoidable shortcomings because
To clarify and control the collapse and weighting of main roof in Iongwall mining is oneof the important research problems in ground control. Based on the resul
On the basis of the analysis of classical stock model, according to the limitation of the model, the article puts forward the revision of classical model and en