DISTRESSING MAINTENANCE ANALYSIS ON ROADWAY OF LARGE DEFORMATION IN SOFT ROCKS WITH PILLARLESS FULLY-MECHANIZED SUBLEVEL CAVING SYSTEM AND ITS APPLICATION
无煤柱综放开采大变形软岩巷道卸压维护分析及其应用

With the help of theoretical analysis,numerical calculation and in-situ observations,the structure around the tailentry in soft rocks and its deformation and failure regularity in pillarless fully-mechanized sublevel caving are mainly introduced. The in-seam distressing entry layout is combined with concussion blasting technique,so that the tailentry in soft rocks can be effectively maintained. Meanwhile,the general distressing principle and practical distressing program are discussed. The theory and practice prove that this is a scientific strategy and an effective decision-making to bring the tailentry in soft rocks under control.