黄沙坪矿业嗣后尾砂充填挡墙压力研究及厚度计算

Pressure Study and Thickness Calculation of Retaining Wall withSubsequent Tailings Filling in Huangshaping Mine

为了消除采空区危害且安全回采矿石,黄沙坪矿采用嗣后全尾砂胶结充填采空区。但由于嗣后尾砂充填采空区面积大、高度高,充填采场内料浆因离析而存在动水压力和静水压力,使得合理计算充填挡墙受力较为困难。文章以黄沙坪矿山为研究背景,研究了尾砂充填条件下充填挡墙压力变化规律,确定了适合嗣后充填挡墙侧压力计算公式。基于黄沙坪矿业嗣后充填采空区参数,结合抗压、抗剪、抗渗透3种计算方式,综合确定嗣后尾砂充填挡墙厚度为0.3m,为类似嗣后充填矿山挡墙设计提供了参考依据。

In order to eliminate the harm of goaf and safely mine ore, a mine uses subsequent full tailings cementation to fill the goaf.However, due to the large area and high height of the goaf filled with tailings, the slurry in the filling stope has hydrodynamic pressure and hydrostatic pressure due to segregation, which makes it difficult to reasonably calculate the stress of the filling retaining wall.Taking the Huangsha mine as the research background, this paper studies the variation law of filling retaining wall pressure under the condition of tailings filling, and determines the calculation formula of lateral pressure suitable for subsequent filling retaining wall.Combined with the three calculation methods of compression, shear and permeability resistance, the thickness of subsequent tailings filling retaining wall is determined to be 0.3 m, which provides a reference for the design of subsequent filling mine retaining wall.