浅埋薄层岩盐溶腔稳定性的数值模拟计算

Numerical Simulation Research on Stabilityof Dissolving Cavityfor the Low-depth-thin-layer Rock Salt

为了延长盐矿井的寿命 ,避免开采带来的地面沉陷 ,并合理利用形成的溶腔 ,必须探讨岩盐水溶开采过程中影响溶腔稳定性的因素 ,以便即时采取有效的防治措施。文章采用ADINA非线性有限元程序对薄层岩盐水溶溶解形成的溶腔稳定性进行了分析研究。结果表明 ,对薄层岩盐矿床而言 ,溶腔的稳定性随其高度的减小而显著增强 ,随跨度的增大而有减弱的趋势 ,倾角对溶腔的稳定性影响很小 ;圆柱形溶腔最为稳定 ,其次为倒锥形 ,组合模型为过渡形态 ;影响溶腔稳定性的因素由强到弱顺序为 :溶腔高度 ,溶腔的几何形态 ,溶腔的跨度 。

In order to extend life of salt well, avoid sinking and use the formed cavity reasonably, the factors of effecton cavity stability must be researched during the process of water mining of rock salt, so that the effective prevention measures can be put. The stability of dissolving cavity for the low depth thin layer rock salt has been researched by the ADINA non linear finite element method.The results show that the stability of dissolving cavity obviously becomes strengthened with the decrease of its height, and has a decreasing trendas with the span increase of the cavity . The effect of incidence on stability of the cavity is very little. The stability of cylindroid cavity is higher than that of converse taper cavity. The assorted model is a kind of transition shape. The influencing order of cavity stability is the ffollows, height>geometrical shape>span>incidence.