高陡山区深部硐室地应力测量方法与结果分析——以大红山铁矿硐室为例

地应力是地下工程围岩稳定与支护结构设计的一个基本参数,其测量方法有很多种。本文详细介绍了适用于深部地下硐室的地应力测量方法——应变解除法,并介绍了大红山铁矿矿区深部地应力测量的方法、过程和结果。在区域地质构造分析的基础上,采用应变解除法进行现场实测,获得了该矿区深部4个水平6个测点的三维地应力状态;利用多方程回归方法分析初始地应力场,获取了大红山铁矿矿区深部地应力分布的基本规律。测量成果为工程设计和稳定性分析提供了依据,并为进一步研究该矿区岩体应力状态和应力场奠定了基础。

Method and Analysis of Ground Stress Measurement of Underground Tunnel in High and Steep Mountainous Area——Taking Dahongshan Iron Mine Tunnel as an Example

Ground stress is a basic parameter to the stability of surrounding rocks and the design of sup- porting structure of underground projects,there are many kinds of methods available for ground stress measurement at present.The stress relaxation method,suitable for rapid measurement in underground tunnel,is introduced in detail in this paper,and the technical procedure and the results of ground stress measurement in Dahongshan Iron Mine mining area are presented as well.Based on the analysis of regional geology,the hollow inclusion stress measurement method was used in this mining area.Through the mea- surement and the multi-variable regression analysis,3-D stress states at 6 points on 4 levels and modes of stress distribution at deep position of Dahongshan Iron Mine mining area are obtained after the initial in- situ stress field was analyzed.These measurement results will provide a basis for the engineering design and the stability analysis and pave a way for further research on rock mass stress state and stress field in the mining area.