Abstract:
It is very difficult to confirm the value of vertical additive pressure of unit surface area of shaft wall, which could be got by test or experience suggested by correlative code. Based on 16 ruptured shaft walls, the value of vertical additive pressure has been inversion statistical analyzed in this article. It is found that the value of vertical additive pressure of different shaft walls in a same coal mine are quite closed, while which has distinguishable difference at different coal mine. Due to loose contact between soil and precast concrete shaft wall, the value of vertical additive pressure of precast concrete shaft wall is very small. The value of vertical additive pressure is not depended on the depth of shaft wall, which depend on the engineering geology of shaft wall. While the value of vertical additive pressure is influenced by many factors, which could hardly be accurately evaluated only by engineering geology. It is indicated that if the conditions of shaft wall to be constructed is similar to the cases analyzed in this article, which value of vertical additive pressure could be quoted and referenced corresponding.