特厚黏土层冻结压力研究与应用

Research and application on freezing pressure of extra-thick clay layer

实测了河南赵固一矿主、副、风井197～507m共7个黏土层的冻结压力。测试结果表明,冻结压力随测层埋深增大,同一层位的冻结压力呈非均匀分布,局部存在较高的集中应力。分析了特厚黏土层冻结压力变化规律及显现特征。应用黄金分割理论确定测层冻结压力值,提出了不同深度冻结压力参考值。

Freezing pressure of seven clay layers was measured for main shaft,auxiliary shaft and ventilation shaft 197~507 m in No.1 Mine of Zhaogu,Henan Province.The test results indicate that the freezing pressure increase with layer depth,freezing pressure on the same level is not evenly distributed and exist higher concentration stress locally.Analyzed the changes law and show characteristics of freezing pressure in extra-thick clay layer.According to Golden Section Theory,the freezing pressure value of measured layer was definited and freezing pressure reference value at different depths was recommended.