井架基础稳定受厚表土冻胀控制的影响

煤矿建井过程中，采用永久井架凿井，具有投资省、工期短等优点，但对于深厚表土冻结凿井时常因冻胀、融沉影响井架基础稳定性，研究控制冻胀、融沉控制对利用永久井架凿井具有现实意义。采用水动力模型进行土体冻胀及控制过程的数值模拟，较好地模拟了连续-间歇冻结模式下的土体冻结过程。采用控制容积法，按有限差分方程讨论离散方程的稳定性和精度，探讨提出基于间歇冻胀可以有效控制土体冻胀的机理，在安居煤矿副井表土段冻结凿井期间开展间歇冻结的工程实施方案，并进行了现场实测，取得了较好的结果。

Derrick foundation stability affected by thick surface soil frost heave control

In coal mine construction,the permanent derrick has many advantages including low investment and short construction period.However,for thick topsoil freezing sinking,due to the frost heaving and thaw settlement influence,the stability of derrick foundation is seriously affected.Study on controlling frost heave and thawing settlement control has a practical significance to the use of permanent derrick.The hydrodynamic model is used to numerically simulate the frost heaving and control process,which better simulates the continuous intermittent freezing mode of soil freezing process.The control volume method is used to discuss the stability and accuracy of the discrete equation.Based on the intermittent mechanism of frost heaving,soil frost heave can be effectively controlled.In Anju mine auxiliary shaft,during surface soil freezing shaft sinking,the intermittent freezing was implemented,and the field test shows that the test achieved a good result.