郭屯煤矿地应力分布规律研究

Study on the distribution law of in-situ stress in Guotun Mine

地应力是巷道围岩变形破坏的基础作用力,分析地应力场分布特征对巷道设计与维护具有重要意义。本文采用理论分析、现场实测、回归拟合等方法,对郭屯煤矿地应力分布规律进行了系统研究。主要研究结果为:(1)根据地质构造特征推断郭屯煤矿最大主应力方向为NWW-SEE;(2)现场实测得出郭屯煤矿最大主应力平均值为37.19 MPa,方向为143.6°(SE36.4°);(3)侧压系数λ平均值为1.734,随埋深呈线性分布。本文研究成果为郭屯煤矿巷道合理布置、支护参数设计等提供了重要参考,对矿井安全、高效生产具有重要意义。

In-situ stress is the basic force for the deformation and failure of roadway surrounding rock. Analyzing the distribution characteristics of in-situ stress field is of great significance for roadway design and maintenance. In this paper,the distribution law of in-situ stress in Guotun Mine was systematically studied by means of theoretical analysis, field measurement and regression fitting. The main research results were as follows:(1) According to the geological structure characteristics, the maximum principal stress direction of Guotun Mine was NWW-SEE;(2) The field measurement showed that the average value of the maximum principal stress in Guotun Mine was 37.19 MPa, and the direction was 143.6 °(SE36.4 °);(3) The side pressure coefficient λ was 1.734, which was linear with the buried depth. The research results of this paper provided an important reference for the reasonable layout of roadway and the design of support parameters in Guotun Mine, and were of great significance for the safety and efficient production of the mine.