小官庄铁矿-300m水平北运巷稳定性研究

Study on the Stability of the North Transport Drift at -300m Levelin Xiaoguanzhuang Iron Mine

为评价小官庄铁矿－３００ｍ水平北运巷的稳定性状况，采用岩土工程数值分析方法，从应力、变形和结构等３个方面的共同效应研究了北区开采对北运巷稳定性的影响。指出了应力集中和张拉域的扩展是该巷道破坏的主要表现形式，并提出了北运巷合理的支护方法和措施。

To evaluate the stability state of the north transport drift at -300 m level in Xiaoguanzhuang Iron Mine,the numerical method of geotechnical engineering is used to study the effect of the mining activity in north area on the stability of the transport drift from the compound effects of stress,deformation and structure.It is pointed out that the stress concentration and the expansion of tension area are the main presentatoin forms of the drift failure.The rational supporting method and measures for the north transport drift are suggested.