基于遍布节理模型的竖井工程破坏机理研究

为揭示金川二矿区14行风井的破坏机理,本文首先根据井筒工程地质条件,建立了集1#矿体和14行风井在内的三维数值模型;然后,采用遍布节理模型分析了采动对14行风井稳定性的影响,从井壁位移和应力方面探索了金川二矿区14行风井的破坏位置和破坏时间。结果表明,导致金川二矿区14行风井破坏的直接原因为采动引起竖井围岩沿弱面的滑移,除此之外,复杂的工程地质条件和低强度的支护形式也是造成14行风井破坏的原因,为14行风井返修加固提供依据。

Research on the Failing Mechanics of Shaft Engineering Based on the Ubiquitous Joint Model

In order to show the failing mechanics of No.14 ventilation shaft in Jinchuan mine district, ifrstly, according to the geological conditions of shaft, three-dimension model was established to integrate No. 1 ore body and No.14 ventilation shaft. Then, the effect of mining on the stability of No.14 ventilation shaft was evaluated numerically based on the ubiquitous joint model, the displacement and stress distribution of shaft were obtained to predict the failing location and time, which shows that the direct reason of failure of No.14 ventilation shaft is the sliding of surrounding rock mass induced by mining. Besides, complex geological conditions and low-strength supporting type are also the factors causing the damage of shaft, which offer some basis for the repairing of shaft.