CHINA MINE ENGINEERING

An iron mine is a ultra-large scale and ultra-deep one. Its ore body is particularly thick, thus the mining area is large. In order to ensure the safety of mining, it is planned that large strip pillars will be arranged between the panels. In this paper, the numerical simulation method is used for a comparative study on the stress characteristics and plastic zone distribution of different schemes, with de-stress schemes taken at the upper, middle and lower parts of panel pillars, and in de-stress schemes lengths respectively of 60m, 120m, 180m and whole length at the upper part of the panel pillars. The study mainly reveals the load-bearing effects of the different de-stress schemes schemes. Its results can provide reference for de-stress schemes mining under similar mining conditions.